Migrate to go modules (Go 1.11)

58 files changed, 2 insertions, 4178 deletions

diff --git a/vendor/golang.org/x/oauth2/amazon/amazon.go b/vendor/golang.org/x/oauth2/amazon/amazon.go
deleted file mode 100644
index d21da11..0000000
--- a/vendor/golang.org/x/oauth2/amazon/amazon.go
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2017 The oauth2 Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package amazon provides constants for using OAuth2 to access Amazon.
-package amazon
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is Amazon's OAuth 2.0 endpoint.
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://www.amazon.com/ap/oa",
-	TokenURL: "https://api.amazon.com/auth/o2/token",
-}
diff --git a/vendor/golang.org/x/oauth2/bitbucket/bitbucket.go b/vendor/golang.org/x/oauth2/bitbucket/bitbucket.go
deleted file mode 100644
index 44af1f1..0000000
--- a/vendor/golang.org/x/oauth2/bitbucket/bitbucket.go
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2015 The oauth2 Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package bitbucket provides constants for using OAuth2 to access Bitbucket.
-package bitbucket
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is Bitbucket's OAuth 2.0 endpoint.
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://bitbucket.org/site/oauth2/authorize",
-	TokenURL: "https://bitbucket.org/site/oauth2/access_token",
-}
diff --git a/vendor/golang.org/x/oauth2/cern/cern.go b/vendor/golang.org/x/oauth2/cern/cern.go
deleted file mode 100644
index 8be7180..0000000
--- a/vendor/golang.org/x/oauth2/cern/cern.go
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2018 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package cern provides constants for using OAuth2 to access CERN services.
-package cern // import "golang.org/x/oauth2/cern"
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is CERN's OAuth 2.0 endpoint.
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://oauth.web.cern.ch/OAuth/Authorize",
-	TokenURL: "https://oauth.web.cern.ch/OAuth/Token",
-}
diff --git a/vendor/golang.org/x/oauth2/clientcredentials/clientcredentials.go b/vendor/golang.org/x/oauth2/clientcredentials/clientcredentials.go
deleted file mode 100644
index c4e840d..0000000
--- a/vendor/golang.org/x/oauth2/clientcredentials/clientcredentials.go
+++ /dev/null
@@ -1,109 +0,0 @@
-// Copyright 2014 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package clientcredentials implements the OAuth2.0 "client credentials" token flow,
-// also known as the "two-legged OAuth 2.0".
-//
-// This should be used when the client is acting on its own behalf or when the client
-// is the resource owner. It may also be used when requesting access to protected
-// resources based on an authorization previously arranged with the authorization
-// server.
-//
-// See https://tools.ietf.org/html/rfc6749#section-4.4
-package clientcredentials // import "golang.org/x/oauth2/clientcredentials"
-
-import (
-	"fmt"
-	"net/http"
-	"net/url"
-	"strings"
-
-	"golang.org/x/net/context"
-	"golang.org/x/oauth2"
-	"golang.org/x/oauth2/internal"
-)
-
-// Config describes a 2-legged OAuth2 flow, with both the
-// client application information and the server's endpoint URLs.
-type Config struct {
-	// ClientID is the application's ID.
-	ClientID string
-
-	// ClientSecret is the application's secret.
-	ClientSecret string
-
-	// TokenURL is the resource server's token endpoint
-	// URL. This is a constant specific to each server.
-	TokenURL string
-
-	// Scope specifies optional requested permissions.
-	Scopes []string
-
-	// EndpointParams specifies additional parameters for requests to the token endpoint.
-	EndpointParams url.Values
-}
-
-// Token uses client credentials to retrieve a token.
-// The HTTP client to use is derived from the context.
-// If nil, http.DefaultClient is used.
-func (c *Config) Token(ctx context.Context) (*oauth2.Token, error) {
-	return c.TokenSource(ctx).Token()
-}
-
-// Client returns an HTTP client using the provided token.
-// The token will auto-refresh as necessary. The underlying
-// HTTP transport will be obtained using the provided context.
-// The returned client and its Transport should not be modified.
-func (c *Config) Client(ctx context.Context) *http.Client {
-	return oauth2.NewClient(ctx, c.TokenSource(ctx))
-}
-
-// TokenSource returns a TokenSource that returns t until t expires,
-// automatically refreshing it as necessary using the provided context and the
-// client ID and client secret.
-//
-// Most users will use Config.Client instead.
-func (c *Config) TokenSource(ctx context.Context) oauth2.TokenSource {
-	source := &tokenSource{
-		ctx:  ctx,
-		conf: c,
-	}
-	return oauth2.ReuseTokenSource(nil, source)
-}
-
-type tokenSource struct {
-	ctx  context.Context
-	conf *Config
-}
-
-// Token refreshes the token by using a new client credentials request.
-// tokens received this way do not include a refresh token
-func (c *tokenSource) Token() (*oauth2.Token, error) {
-	v := url.Values{
-		"grant_type": {"client_credentials"},
-	}
-	if len(c.conf.Scopes) > 0 {
-		v.Set("scope", strings.Join(c.conf.Scopes, " "))
-	}
-	for k, p := range c.conf.EndpointParams {
-		if _, ok := v[k]; ok {
-			return nil, fmt.Errorf("oauth2: cannot overwrite parameter %q", k)
-		}
-		v[k] = p
-	}
-	tk, err := internal.RetrieveToken(c.ctx, c.conf.ClientID, c.conf.ClientSecret, c.conf.TokenURL, v)
-	if err != nil {
-		if rErr, ok := err.(*internal.RetrieveError); ok {
-			return nil, (*oauth2.RetrieveError)(rErr)
-		}
-		return nil, err
-	}
-	t := &oauth2.Token{
-		AccessToken:  tk.AccessToken,
-		TokenType:    tk.TokenType,
-		RefreshToken: tk.RefreshToken,
-		Expiry:       tk.Expiry,
-	}
-	return t.WithExtra(tk.Raw), nil
-}
diff --git a/vendor/golang.org/x/oauth2/clientcredentials/clientcredentials_test.go b/vendor/golang.org/x/oauth2/clientcredentials/clientcredentials_test.go
deleted file mode 100644
index 108520c..0000000
--- a/vendor/golang.org/x/oauth2/clientcredentials/clientcredentials_test.go
+++ /dev/null
@@ -1,97 +0,0 @@
-// Copyright 2014 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package clientcredentials
-
-import (
-	"context"
-	"io/ioutil"
-	"net/http"
-	"net/http/httptest"
-	"net/url"
-	"testing"
-)
-
-func newConf(serverURL string) *Config {
-	return &Config{
-		ClientID:       "CLIENT_ID",
-		ClientSecret:   "CLIENT_SECRET",
-		Scopes:         []string{"scope1", "scope2"},
-		TokenURL:       serverURL + "/token",
-		EndpointParams: url.Values{"audience": {"audience1"}},
-	}
-}
-
-type mockTransport struct {
-	rt func(req *http.Request) (resp *http.Response, err error)
-}
-
-func (t *mockTransport) RoundTrip(req *http.Request) (resp *http.Response, err error) {
-	return t.rt(req)
-}
-
-func TestTokenRequest(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.String() != "/token" {
-			t.Errorf("authenticate client request URL = %q; want %q", r.URL, "/token")
-		}
-		headerAuth := r.Header.Get("Authorization")
-		if headerAuth != "Basic Q0xJRU5UX0lEOkNMSUVOVF9TRUNSRVQ=" {
-			t.Errorf("Unexpected authorization header, %v is found.", headerAuth)
-		}
-		if got, want := r.Header.Get("Content-Type"), "application/x-www-form-urlencoded"; got != want {
-			t.Errorf("Content-Type header = %q; want %q", got, want)
-		}
-		body, err := ioutil.ReadAll(r.Body)
-		if err != nil {
-			r.Body.Close()
-		}
-		if err != nil {
-			t.Errorf("failed reading request body: %s.", err)
-		}
-		if string(body) != "audience=audience1&grant_type=client_credentials&scope=scope1+scope2" {
-			t.Errorf("payload = %q; want %q", string(body), "grant_type=client_credentials&scope=scope1+scope2")
-		}
-		w.Header().Set("Content-Type", "application/x-www-form-urlencoded")
-		w.Write([]byte("access_token=90d64460d14870c08c81352a05dedd3465940a7c&token_type=bearer"))
-	}))
-	defer ts.Close()
-	conf := newConf(ts.URL)
-	tok, err := conf.Token(context.Background())
-	if err != nil {
-		t.Error(err)
-	}
-	if !tok.Valid() {
-		t.Fatalf("token invalid. got: %#v", tok)
-	}
-	if tok.AccessToken != "90d64460d14870c08c81352a05dedd3465940a7c" {
-		t.Errorf("Access token = %q; want %q", tok.AccessToken, "90d64460d14870c08c81352a05dedd3465940a7c")
-	}
-	if tok.TokenType != "bearer" {
-		t.Errorf("token type = %q; want %q", tok.TokenType, "bearer")
-	}
-}
-
-func TestTokenRefreshRequest(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.String() == "/somethingelse" {
-			return
-		}
-		if r.URL.String() != "/token" {
-			t.Errorf("Unexpected token refresh request URL, %v is found.", r.URL)
-		}
-		headerContentType := r.Header.Get("Content-Type")
-		if headerContentType != "application/x-www-form-urlencoded" {
-			t.Errorf("Unexpected Content-Type header, %v is found.", headerContentType)
-		}
-		body, _ := ioutil.ReadAll(r.Body)
-		if string(body) != "audience=audience1&grant_type=client_credentials&scope=scope1+scope2" {
-			t.Errorf("Unexpected refresh token payload, %v is found.", string(body))
-		}
-	}))
-	defer ts.Close()
-	conf := newConf(ts.URL)
-	c := conf.Client(context.Background())
-	c.Get(ts.URL + "/somethingelse")
-}
diff --git a/vendor/golang.org/x/oauth2/example_test.go b/vendor/golang.org/x/oauth2/example_test.go
deleted file mode 100644
index fc2f793..0000000
--- a/vendor/golang.org/x/oauth2/example_test.go
+++ /dev/null
@@ -1,89 +0,0 @@
-// Copyright 2014 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package oauth2_test
-
-import (
-	"context"
-	"fmt"
-	"log"
-	"net/http"
-	"time"
-
-	"golang.org/x/oauth2"
-)
-
-func ExampleConfig() {
-	ctx := context.Background()
-	conf := &oauth2.Config{
-		ClientID:     "YOUR_CLIENT_ID",
-		ClientSecret: "YOUR_CLIENT_SECRET",
-		Scopes:       []string{"SCOPE1", "SCOPE2"},
-		Endpoint: oauth2.Endpoint{
-			AuthURL:  "https://provider.com/o/oauth2/auth",
-			TokenURL: "https://provider.com/o/oauth2/token",
-		},
-	}
-
-	// Redirect user to consent page to ask for permission
-	// for the scopes specified above.
-	url := conf.AuthCodeURL("state", oauth2.AccessTypeOffline)
-	fmt.Printf("Visit the URL for the auth dialog: %v", url)
-
-	// Use the authorization code that is pushed to the redirect
-	// URL. Exchange will do the handshake to retrieve the
-	// initial access token. The HTTP Client returned by
-	// conf.Client will refresh the token as necessary.
-	var code string
-	if _, err := fmt.Scan(&code); err != nil {
-		log.Fatal(err)
-	}
-	tok, err := conf.Exchange(ctx, code)
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	client := conf.Client(ctx, tok)
-	client.Get("...")
-}
-
-func ExampleConfig_customHTTP() {
-	ctx := context.Background()
-
-	conf := &oauth2.Config{
-		ClientID:     "YOUR_CLIENT_ID",
-		ClientSecret: "YOUR_CLIENT_SECRET",
-		Scopes:       []string{"SCOPE1", "SCOPE2"},
-		Endpoint: oauth2.Endpoint{
-			TokenURL: "https://provider.com/o/oauth2/token",
-			AuthURL:  "https://provider.com/o/oauth2/auth",
-		},
-	}
-
-	// Redirect user to consent page to ask for permission
-	// for the scopes specified above.
-	url := conf.AuthCodeURL("state", oauth2.AccessTypeOffline)
-	fmt.Printf("Visit the URL for the auth dialog: %v", url)
-
-	// Use the authorization code that is pushed to the redirect
-	// URL. Exchange will do the handshake to retrieve the
-	// initial access token. The HTTP Client returned by
-	// conf.Client will refresh the token as necessary.
-	var code string
-	if _, err := fmt.Scan(&code); err != nil {
-		log.Fatal(err)
-	}
-
-	// Use the custom HTTP client when requesting a token.
-	httpClient := &http.Client{Timeout: 2 * time.Second}
-	ctx = context.WithValue(ctx, oauth2.HTTPClient, httpClient)
-
-	tok, err := conf.Exchange(ctx, code)
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	client := conf.Client(ctx, tok)
-	_ = client
-}
diff --git a/vendor/golang.org/x/oauth2/facebook/facebook.go b/vendor/golang.org/x/oauth2/facebook/facebook.go
deleted file mode 100644
index 14c801a..0000000
--- a/vendor/golang.org/x/oauth2/facebook/facebook.go
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package facebook provides constants for using OAuth2 to access Facebook.
-package facebook // import "golang.org/x/oauth2/facebook"
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is Facebook's OAuth 2.0 endpoint.
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://www.facebook.com/dialog/oauth",
-	TokenURL: "https://graph.facebook.com/oauth/access_token",
-}
diff --git a/vendor/golang.org/x/oauth2/fitbit/fitbit.go b/vendor/golang.org/x/oauth2/fitbit/fitbit.go
deleted file mode 100644
index b31b82a..0000000
--- a/vendor/golang.org/x/oauth2/fitbit/fitbit.go
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2016 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package fitbit provides constants for using OAuth2 to access the Fitbit API.
-package fitbit // import "golang.org/x/oauth2/fitbit"
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is the Fitbit API's OAuth 2.0 endpoint.
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://www.fitbit.com/oauth2/authorize",
-	TokenURL: "https://api.fitbit.com/oauth2/token",
-}
diff --git a/vendor/golang.org/x/oauth2/foursquare/foursquare.go b/vendor/golang.org/x/oauth2/foursquare/foursquare.go
deleted file mode 100644
index d2fa099..0000000
--- a/vendor/golang.org/x/oauth2/foursquare/foursquare.go
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2016 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package foursquare provides constants for using OAuth2 to access Foursquare.
-package foursquare // import "golang.org/x/oauth2/foursquare"
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is Foursquare's OAuth 2.0 endpoint.
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://foursquare.com/oauth2/authorize",
-	TokenURL: "https://foursquare.com/oauth2/access_token",
-}
diff --git a/vendor/golang.org/x/oauth2/github/github.go b/vendor/golang.org/x/oauth2/github/github.go
deleted file mode 100644
index f297801..0000000
--- a/vendor/golang.org/x/oauth2/github/github.go
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2014 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package github provides constants for using OAuth2 to access Github.
-package github // import "golang.org/x/oauth2/github"
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is Github's OAuth 2.0 endpoint.
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://github.com/login/oauth/authorize",
-	TokenURL: "https://github.com/login/oauth/access_token",
-}
diff --git a/vendor/golang.org/x/oauth2/gitlab/gitlab.go b/vendor/golang.org/x/oauth2/gitlab/gitlab.go
deleted file mode 100644
index 1231d75..0000000
--- a/vendor/golang.org/x/oauth2/gitlab/gitlab.go
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2018 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package gitlab provides constants for using OAuth2 to access GitLab.
-package gitlab // import "golang.org/x/oauth2/gitlab"
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is GitLab's OAuth 2.0 endpoint.
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://gitlab.com/oauth/authorize",
-	TokenURL: "https://gitlab.com/oauth/token",
-}
diff --git a/vendor/golang.org/x/oauth2/google/appengine.go b/vendor/golang.org/x/oauth2/google/appengine.go
deleted file mode 100644
index 50d918b..0000000
--- a/vendor/golang.org/x/oauth2/google/appengine.go
+++ /dev/null
@@ -1,89 +0,0 @@
-// Copyright 2014 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package google
-
-import (
-	"sort"
-	"strings"
-	"sync"
-	"time"
-
-	"golang.org/x/net/context"
-	"golang.org/x/oauth2"
-)
-
-// appengineFlex is set at init time by appengineflex_hook.go. If true, we are on App Engine Flex.
-var appengineFlex bool
-
-// Set at init time by appengine_hook.go. If nil, we're not on App Engine.
-var appengineTokenFunc func(c context.Context, scopes ...string) (token string, expiry time.Time, err error)
-
-// Set at init time by appengine_hook.go. If nil, we're not on App Engine.
-var appengineAppIDFunc func(c context.Context) string
-
-// AppEngineTokenSource returns a token source that fetches tokens
-// issued to the current App Engine application's service account.
-// If you are implementing a 3-legged OAuth 2.0 flow on App Engine
-// that involves user accounts, see oauth2.Config instead.
-//
-// The provided context must have come from appengine.NewContext.
-func AppEngineTokenSource(ctx context.Context, scope ...string) oauth2.TokenSource {
-	if appengineTokenFunc == nil {
-		panic("google: AppEngineTokenSource can only be used on App Engine.")
-	}
-	scopes := append([]string{}, scope...)
-	sort.Strings(scopes)
-	return &appEngineTokenSource{
-		ctx:    ctx,
-		scopes: scopes,
-		key:    strings.Join(scopes, " "),
-	}
-}
-
-// aeTokens helps the fetched tokens to be reused until their expiration.
-var (
-	aeTokensMu sync.Mutex
-	aeTokens   = make(map[string]*tokenLock) // key is space-separated scopes
-)
-
-type tokenLock struct {
-	mu sync.Mutex // guards t; held while fetching or updating t
-	t  *oauth2.Token
-}
-
-type appEngineTokenSource struct {
-	ctx    context.Context
-	scopes []string
-	key    string // to aeTokens map; space-separated scopes
-}
-
-func (ts *appEngineTokenSource) Token() (*oauth2.Token, error) {
-	if appengineTokenFunc == nil {
-		panic("google: AppEngineTokenSource can only be used on App Engine.")
-	}
-
-	aeTokensMu.Lock()
-	tok, ok := aeTokens[ts.key]
-	if !ok {
-		tok = &tokenLock{}
-		aeTokens[ts.key] = tok
-	}
-	aeTokensMu.Unlock()
-
-	tok.mu.Lock()
-	defer tok.mu.Unlock()
-	if tok.t.Valid() {
-		return tok.t, nil
-	}
-	access, exp, err := appengineTokenFunc(ts.ctx, ts.scopes...)
-	if err != nil {
-		return nil, err
-	}
-	tok.t = &oauth2.Token{
-		AccessToken: access,
-		Expiry:      exp,
-	}
-	return tok.t, nil
-}
diff --git a/vendor/golang.org/x/oauth2/google/appengine_hook.go b/vendor/golang.org/x/oauth2/google/appengine_hook.go
deleted file mode 100644
index 56669ea..0000000
--- a/vendor/golang.org/x/oauth2/google/appengine_hook.go
+++ /dev/null
@@ -1,14 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build appengine appenginevm
-
-package google
-
-import "google.golang.org/appengine"
-
-func init() {
-	appengineTokenFunc = appengine.AccessToken
-	appengineAppIDFunc = appengine.AppID
-}
diff --git a/vendor/golang.org/x/oauth2/google/appengineflex_hook.go b/vendor/golang.org/x/oauth2/google/appengineflex_hook.go
deleted file mode 100644
index 5d0231a..0000000
--- a/vendor/golang.org/x/oauth2/google/appengineflex_hook.go
+++ /dev/null
@@ -1,11 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build appenginevm
-
-package google
-
-func init() {
-	appengineFlex = true // Flex doesn't support appengine.AccessToken; depend on metadata server.
-}
diff --git a/vendor/golang.org/x/oauth2/google/default.go b/vendor/golang.org/x/oauth2/google/default.go
deleted file mode 100644
index a316074..0000000
--- a/vendor/golang.org/x/oauth2/google/default.go
+++ /dev/null
@@ -1,115 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package google
-
-import (
-	"encoding/json"
-	"fmt"
-	"io/ioutil"
-	"net/http"
-	"os"
-	"path/filepath"
-	"runtime"
-
-	"cloud.google.com/go/compute/metadata"
-	"golang.org/x/net/context"
-	"golang.org/x/oauth2"
-)
-
-// DefaultClient returns an HTTP Client that uses the
-// DefaultTokenSource to obtain authentication credentials.
-func DefaultClient(ctx context.Context, scope ...string) (*http.Client, error) {
-	ts, err := DefaultTokenSource(ctx, scope...)
-	if err != nil {
-		return nil, err
-	}
-	return oauth2.NewClient(ctx, ts), nil
-}
-
-// DefaultTokenSource returns the token source for
-// "Application Default Credentials".
-// It is a shortcut for FindDefaultCredentials(ctx, scope).TokenSource.
-func DefaultTokenSource(ctx context.Context, scope ...string) (oauth2.TokenSource, error) {
-	creds, err := FindDefaultCredentials(ctx, scope...)
-	if err != nil {
-		return nil, err
-	}
-	return creds.TokenSource, nil
-}
-
-// Common implementation for FindDefaultCredentials.
-func findDefaultCredentials(ctx context.Context, scopes []string) (*DefaultCredentials, error) {
-	// First, try the environment variable.
-	const envVar = "GOOGLE_APPLICATION_CREDENTIALS"
-	if filename := os.Getenv(envVar); filename != "" {
-		creds, err := readCredentialsFile(ctx, filename, scopes)
-		if err != nil {
-			return nil, fmt.Errorf("google: error getting credentials using %v environment variable: %v", envVar, err)
-		}
-		return creds, nil
-	}
-
-	// Second, try a well-known file.
-	filename := wellKnownFile()
-	if creds, err := readCredentialsFile(ctx, filename, scopes); err == nil {
-		return creds, nil
-	} else if !os.IsNotExist(err) {
-		return nil, fmt.Errorf("google: error getting credentials using well-known file (%v): %v", filename, err)
-	}
-
-	// Third, if we're on Google App Engine use those credentials.
-	if appengineTokenFunc != nil && !appengineFlex {
-		return &DefaultCredentials{
-			ProjectID:   appengineAppIDFunc(ctx),
-			TokenSource: AppEngineTokenSource(ctx, scopes...),
-		}, nil
-	}
-
-	// Fourth, if we're on Google Compute Engine use the metadata server.
-	if metadata.OnGCE() {
-		id, _ := metadata.ProjectID()
-		return &DefaultCredentials{
-			ProjectID:   id,
-			TokenSource: ComputeTokenSource(""),
-		}, nil
-	}
-
-	// None are found; return helpful error.
-	const url = "https://developers.google.com/accounts/docs/application-default-credentials"
-	return nil, fmt.Errorf("google: could not find default credentials. See %v for more information.", url)
-}
-
-// Common implementation for CredentialsFromJSON.
-func credentialsFromJSON(ctx context.Context, jsonData []byte, scopes []string) (*DefaultCredentials, error) {
-	var f credentialsFile
-	if err := json.Unmarshal(jsonData, &f); err != nil {
-		return nil, err
-	}
-	ts, err := f.tokenSource(ctx, append([]string(nil), scopes...))
-	if err != nil {
-		return nil, err
-	}
-	return &DefaultCredentials{
-		ProjectID:   f.ProjectID,
-		TokenSource: ts,
-		JSON:        jsonData,
-	}, nil
-}
-
-func wellKnownFile() string {
-	const f = "application_default_credentials.json"
-	if runtime.GOOS == "windows" {
-		return filepath.Join(os.Getenv("APPDATA"), "gcloud", f)
-	}
-	return filepath.Join(guessUnixHomeDir(), ".config", "gcloud", f)
-}
-
-func readCredentialsFile(ctx context.Context, filename string, scopes []string) (*DefaultCredentials, error) {
-	b, err := ioutil.ReadFile(filename)
-	if err != nil {
-		return nil, err
-	}
-	return CredentialsFromJSON(ctx, b, scopes...)
-}
diff --git a/vendor/golang.org/x/oauth2/google/doc_go19.go b/vendor/golang.org/x/oauth2/google/doc_go19.go
deleted file mode 100644
index 2a86325..0000000
--- a/vendor/golang.org/x/oauth2/google/doc_go19.go
+++ /dev/null
@@ -1,42 +0,0 @@
-// Copyright 2018 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build go1.9
-
-// Package google provides support for making OAuth2 authorized and authenticated
-// HTTP requests to Google APIs. It supports the Web server flow, client-side
-// credentials, service accounts, Google Compute Engine service accounts, and Google
-// App Engine service accounts.
-//
-// A brief overview of the package follows. For more information, please read
-// https://developers.google.com/accounts/docs/OAuth2
-// and
-// https://developers.google.com/accounts/docs/application-default-credentials.
-//
-// OAuth2 Configs
-//
-// Two functions in this package return golang.org/x/oauth2.Config values from Google credential
-// data. Google supports two JSON formats for OAuth2 credentials: one is handled by ConfigFromJSON,
-// the other by JWTConfigFromJSON. The returned Config can be used to obtain a TokenSource or
-// create an http.Client.
-//
-//
-// Credentials
-//
-// The Credentials type represents Google credentials, including Application Default
-// Credentials.
-//
-// Use FindDefaultCredentials to obtain Application Default Credentials.
-// FindDefaultCredentials looks in some well-known places for a credentials file, and
-// will call AppEngineTokenSource or ComputeTokenSource as needed.
-//
-// DefaultClient and DefaultTokenSource are convenience methods. They first call FindDefaultCredentials,
-// then use the credentials to construct an http.Client or an oauth2.TokenSource.
-//
-// Use CredentialsFromJSON to obtain credentials from either of the two JSON formats
-// described in OAuth2 Configs, above. The TokenSource in the returned value is the
-// same as the one obtained from the oauth2.Config returned from ConfigFromJSON or
-// JWTConfigFromJSON, but the Credentials may contain additional information
-// that is useful is some circumstances.
-package google // import "golang.org/x/oauth2/google"
diff --git a/vendor/golang.org/x/oauth2/google/doc_not_go19.go b/vendor/golang.org/x/oauth2/google/doc_not_go19.go
deleted file mode 100644
index 5c3c6e1..0000000
--- a/vendor/golang.org/x/oauth2/google/doc_not_go19.go
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2018 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build !go1.9
-
-// Package google provides support for making OAuth2 authorized and authenticated
-// HTTP requests to Google APIs. It supports the Web server flow, client-side
-// credentials, service accounts, Google Compute Engine service accounts, and Google
-// App Engine service accounts.
-//
-// A brief overview of the package follows. For more information, please read
-// https://developers.google.com/accounts/docs/OAuth2
-// and
-// https://developers.google.com/accounts/docs/application-default-credentials.
-//
-// OAuth2 Configs
-//
-// Two functions in this package return golang.org/x/oauth2.Config values from Google credential
-// data. Google supports two JSON formats for OAuth2 credentials: one is handled by ConfigFromJSON,
-// the other by JWTConfigFromJSON. The returned Config can be used to obtain a TokenSource or
-// create an http.Client.
-//
-//
-// Credentials
-//
-// The DefaultCredentials type represents Google Application Default Credentials, as
-// well as other forms of credential.
-//
-// Use FindDefaultCredentials to obtain Application Default Credentials.
-// FindDefaultCredentials looks in some well-known places for a credentials file, and
-// will call AppEngineTokenSource or ComputeTokenSource as needed.
-//
-// DefaultClient and DefaultTokenSource are convenience methods. They first call FindDefaultCredentials,
-// then use the credentials to construct an http.Client or an oauth2.TokenSource.
-//
-// Use CredentialsFromJSON to obtain credentials from either of the two JSON
-// formats described in OAuth2 Configs, above. (The DefaultCredentials returned may
-// not be "Application Default Credentials".) The TokenSource in the returned value
-// is the same as the one obtained from the oauth2.Config returned from
-// ConfigFromJSON or JWTConfigFromJSON, but the DefaultCredentials may contain
-// additional information that is useful is some circumstances.
-package google // import "golang.org/x/oauth2/google"
diff --git a/vendor/golang.org/x/oauth2/google/example_test.go b/vendor/golang.org/x/oauth2/google/example_test.go
deleted file mode 100644
index 643f507..0000000
--- a/vendor/golang.org/x/oauth2/google/example_test.go
+++ /dev/null
@@ -1,162 +0,0 @@
-// Copyright 2014 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package google_test
-
-import (
-	"fmt"
-	"io/ioutil"
-	"log"
-	"net/http"
-
-	"golang.org/x/net/context"
-	"golang.org/x/oauth2"
-	"golang.org/x/oauth2/google"
-	"golang.org/x/oauth2/jwt"
-	"google.golang.org/appengine"
-	"google.golang.org/appengine/urlfetch"
-)
-
-func ExampleDefaultClient() {
-	client, err := google.DefaultClient(oauth2.NoContext,
-		"https://www.googleapis.com/auth/devstorage.full_control")
-	if err != nil {
-		log.Fatal(err)
-	}
-	client.Get("...")
-}
-
-func Example_webServer() {
-	// Your credentials should be obtained from the Google
-	// Developer Console (https://console.developers.google.com).
-	conf := &oauth2.Config{
-		ClientID:     "YOUR_CLIENT_ID",
-		ClientSecret: "YOUR_CLIENT_SECRET",
-		RedirectURL:  "YOUR_REDIRECT_URL",
-		Scopes: []string{
-			"https://www.googleapis.com/auth/bigquery",
-			"https://www.googleapis.com/auth/blogger",
-		},
-		Endpoint: google.Endpoint,
-	}
-	// Redirect user to Google's consent page to ask for permission
-	// for the scopes specified above.
-	url := conf.AuthCodeURL("state")
-	fmt.Printf("Visit the URL for the auth dialog: %v", url)
-
-	// Handle the exchange code to initiate a transport.
-	tok, err := conf.Exchange(oauth2.NoContext, "authorization-code")
-	if err != nil {
-		log.Fatal(err)
-	}
-	client := conf.Client(oauth2.NoContext, tok)
-	client.Get("...")
-}
-
-func ExampleJWTConfigFromJSON() {
-	// Your credentials should be obtained from the Google
-	// Developer Console (https://console.developers.google.com).
-	// Navigate to your project, then see the "Credentials" page
-	// under "APIs & Auth".
-	// To create a service account client, click "Create new Client ID",
-	// select "Service Account", and click "Create Client ID". A JSON
-	// key file will then be downloaded to your computer.
-	data, err := ioutil.ReadFile("/path/to/your-project-key.json")
-	if err != nil {
-		log.Fatal(err)
-	}
-	conf, err := google.JWTConfigFromJSON(data, "https://www.googleapis.com/auth/bigquery")
-	if err != nil {
-		log.Fatal(err)
-	}
-	// Initiate an http.Client. The following GET request will be
-	// authorized and authenticated on the behalf of
-	// your service account.
-	client := conf.Client(oauth2.NoContext)
-	client.Get("...")
-}
-
-func ExampleSDKConfig() {
-	// The credentials will be obtained from the first account that
-	// has been authorized with `gcloud auth login`.
-	conf, err := google.NewSDKConfig("")
-	if err != nil {
-		log.Fatal(err)
-	}
-	// Initiate an http.Client. The following GET request will be
-	// authorized and authenticated on the behalf of the SDK user.
-	client := conf.Client(oauth2.NoContext)
-	client.Get("...")
-}
-
-func Example_serviceAccount() {
-	// Your credentials should be obtained from the Google
-	// Developer Console (https://console.developers.google.com).
-	conf := &jwt.Config{
-		Email: "xxx@developer.gserviceaccount.com",
-		// The contents of your RSA private key or your PEM file
-		// that contains a private key.
-		// If you have a p12 file instead, you
-		// can use `openssl` to export the private key into a pem file.
-		//
-		//    $ openssl pkcs12 -in key.p12 -passin pass:notasecret -out key.pem -nodes
-		//
-		// The field only supports PEM containers with no passphrase.
-		// The openssl command will convert p12 keys to passphrase-less PEM containers.
-		PrivateKey: []byte("-----BEGIN RSA PRIVATE KEY-----..."),
-		Scopes: []string{
-			"https://www.googleapis.com/auth/bigquery",
-			"https://www.googleapis.com/auth/blogger",
-		},
-		TokenURL: google.JWTTokenURL,
-		// If you would like to impersonate a user, you can
-		// create a transport with a subject. The following GET
-		// request will be made on the behalf of user@example.com.
-		// Optional.
-		Subject: "user@example.com",
-	}
-	// Initiate an http.Client, the following GET request will be
-	// authorized and authenticated on the behalf of user@example.com.
-	client := conf.Client(oauth2.NoContext)
-	client.Get("...")
-}
-
-func ExampleAppEngineTokenSource() {
-	var req *http.Request // from the ServeHTTP handler
-	ctx := appengine.NewContext(req)
-	client := &http.Client{
-		Transport: &oauth2.Transport{
-			Source: google.AppEngineTokenSource(ctx, "https://www.googleapis.com/auth/bigquery"),
-			Base: &urlfetch.Transport{
-				Context: ctx,
-			},
-		},
-	}
-	client.Get("...")
-}
-
-func ExampleComputeTokenSource() {
-	client := &http.Client{
-		Transport: &oauth2.Transport{
-			// Fetch from Google Compute Engine's metadata server to retrieve
-			// an access token for the provided account.
-			// If no account is specified, "default" is used.
-			Source: google.ComputeTokenSource(""),
-		},
-	}
-	client.Get("...")
-}
-
-func ExampleCredentialsFromJSON() {
-	ctx := context.Background()
-	data, err := ioutil.ReadFile("/path/to/key-file.json")
-	if err != nil {
-		log.Fatal(err)
-	}
-	creds, err := google.CredentialsFromJSON(ctx, data, "https://www.googleapis.com/auth/bigquery")
-	if err != nil {
-		log.Fatal(err)
-	}
-	_ = creds // TODO: Use creds.
-}
diff --git a/vendor/golang.org/x/oauth2/google/go19.go b/vendor/golang.org/x/oauth2/google/go19.go
deleted file mode 100644
index 4d0318b..0000000
--- a/vendor/golang.org/x/oauth2/google/go19.go
+++ /dev/null
@@ -1,57 +0,0 @@
-// Copyright 2018 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build go1.9
-
-package google
-
-import (
-	"golang.org/x/net/context"
-	"golang.org/x/oauth2"
-)
-
-// Credentials holds Google credentials, including "Application Default Credentials".
-// For more details, see:
-// https://developers.google.com/accounts/docs/application-default-credentials
-type Credentials struct {
-	ProjectID   string // may be empty
-	TokenSource oauth2.TokenSource
-
-	// JSON contains the raw bytes from a JSON credentials file.
-	// This field may be nil if authentication is provided by the
-	// environment and not with a credentials file, e.g. when code is
-	// running on Google Cloud Platform.
-	JSON []byte
-}
-
-// DefaultCredentials is the old name of Credentials.
-//
-// Deprecated: use Credentials instead.
-type DefaultCredentials = Credentials
-
-// FindDefaultCredentials searches for "Application Default Credentials".
-//
-// It looks for credentials in the following places,
-// preferring the first location found:
-//
-//   1. A JSON file whose path is specified by the
-//      GOOGLE_APPLICATION_CREDENTIALS environment variable.
-//   2. A JSON file in a location known to the gcloud command-line tool.
-//      On Windows, this is %APPDATA%/gcloud/application_default_credentials.json.
-//      On other systems, $HOME/.config/gcloud/application_default_credentials.json.
-//   3. On Google App Engine it uses the appengine.AccessToken function.
-//   4. On Google Compute Engine and Google App Engine Managed VMs, it fetches
-//      credentials from the metadata server.
-//      (In this final case any provided scopes are ignored.)
-func FindDefaultCredentials(ctx context.Context, scopes ...string) (*Credentials, error) {
-	return findDefaultCredentials(ctx, scopes)
-}
-
-// CredentialsFromJSON obtains Google credentials from a JSON value. The JSON can
-// represent either a Google Developers Console client_credentials.json file (as in
-// ConfigFromJSON) or a Google Developers service account key file (as in
-// JWTConfigFromJSON).
-func CredentialsFromJSON(ctx context.Context, jsonData []byte, scopes ...string) (*Credentials, error) {
-	return credentialsFromJSON(ctx, jsonData, scopes)
-}
diff --git a/vendor/golang.org/x/oauth2/google/google.go b/vendor/golang.org/x/oauth2/google/google.go
deleted file mode 100644
index f7481fb..0000000
--- a/vendor/golang.org/x/oauth2/google/google.go
+++ /dev/null
@@ -1,192 +0,0 @@
-// Copyright 2014 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package google
-
-import (
-	"encoding/json"
-	"errors"
-	"fmt"
-	"strings"
-	"time"
-
-	"cloud.google.com/go/compute/metadata"
-	"golang.org/x/net/context"
-	"golang.org/x/oauth2"
-	"golang.org/x/oauth2/jwt"
-)
-
-// Endpoint is Google's OAuth 2.0 endpoint.
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://accounts.google.com/o/oauth2/auth",
-	TokenURL: "https://accounts.google.com/o/oauth2/token",
-}
-
-// JWTTokenURL is Google's OAuth 2.0 token URL to use with the JWT flow.
-const JWTTokenURL = "https://accounts.google.com/o/oauth2/token"
-
-// ConfigFromJSON uses a Google Developers Console client_credentials.json
-// file to construct a config.
-// client_credentials.json can be downloaded from
-// https://console.developers.google.com, under "Credentials". Download the Web
-// application credentials in the JSON format and provide the contents of the
-// file as jsonKey.
-func ConfigFromJSON(jsonKey []byte, scope ...string) (*oauth2.Config, error) {
-	type cred struct {
-		ClientID     string   `json:"client_id"`
-		ClientSecret string   `json:"client_secret"`
-		RedirectURIs []string `json:"redirect_uris"`
-		AuthURI      string   `json:"auth_uri"`
-		TokenURI     string   `json:"token_uri"`
-	}
-	var j struct {
-		Web       *cred `json:"web"`
-		Installed *cred `json:"installed"`
-	}
-	if err := json.Unmarshal(jsonKey, &j); err != nil {
-		return nil, err
-	}
-	var c *cred
-	switch {
-	case j.Web != nil:
-		c = j.Web
-	case j.Installed != nil:
-		c = j.Installed
-	default:
-		return nil, fmt.Errorf("oauth2/google: no credentials found")
-	}
-	if len(c.RedirectURIs) < 1 {
-		return nil, errors.New("oauth2/google: missing redirect URL in the client_credentials.json")
-	}
-	return &oauth2.Config{
-		ClientID:     c.ClientID,
-		ClientSecret: c.ClientSecret,
-		RedirectURL:  c.RedirectURIs[0],
-		Scopes:       scope,
-		Endpoint: oauth2.Endpoint{
-			AuthURL:  c.AuthURI,
-			TokenURL: c.TokenURI,
-		},
-	}, nil
-}
-
-// JWTConfigFromJSON uses a Google Developers service account JSON key file to read
-// the credentials that authorize and authenticate the requests.
-// Create a service account on "Credentials" for your project at
-// https://console.developers.google.com to download a JSON key file.
-func JWTConfigFromJSON(jsonKey []byte, scope ...string) (*jwt.Config, error) {
-	var f credentialsFile
-	if err := json.Unmarshal(jsonKey, &f); err != nil {
-		return nil, err
-	}
-	if f.Type != serviceAccountKey {
-		return nil, fmt.Errorf("google: read JWT from JSON credentials: 'type' field is %q (expected %q)", f.Type, serviceAccountKey)
-	}
-	scope = append([]string(nil), scope...) // copy
-	return f.jwtConfig(scope), nil
-}
-
-// JSON key file types.
-const (
-	serviceAccountKey  = "service_account"
-	userCredentialsKey = "authorized_user"
-)
-
-// credentialsFile is the unmarshalled representation of a credentials file.
-type credentialsFile struct {
-	Type string `json:"type"` // serviceAccountKey or userCredentialsKey
-
-	// Service Account fields
-	ClientEmail  string `json:"client_email"`
-	PrivateKeyID string `json:"private_key_id"`
-	PrivateKey   string `json:"private_key"`
-	TokenURL     string `json:"token_uri"`
-	ProjectID    string `json:"project_id"`
-
-	// User Credential fields
-	// (These typically come from gcloud auth.)
-	ClientSecret string `json:"client_secret"`
-	ClientID     string `json:"client_id"`
-	RefreshToken string `json:"refresh_token"`
-}
-
-func (f *credentialsFile) jwtConfig(scopes []string) *jwt.Config {
-	cfg := &jwt.Config{
-		Email:        f.ClientEmail,
-		PrivateKey:   []byte(f.PrivateKey),
-		PrivateKeyID: f.PrivateKeyID,
-		Scopes:       scopes,
-		TokenURL:     f.TokenURL,
-	}
-	if cfg.TokenURL == "" {
-		cfg.TokenURL = JWTTokenURL
-	}
-	return cfg
-}
-
-func (f *credentialsFile) tokenSource(ctx context.Context, scopes []string) (oauth2.TokenSource, error) {
-	switch f.Type {
-	case serviceAccountKey:
-		cfg := f.jwtConfig(scopes)
-		return cfg.TokenSource(ctx), nil
-	case userCredentialsKey:
-		cfg := &oauth2.Config{
-			ClientID:     f.ClientID,
-			ClientSecret: f.ClientSecret,
-			Scopes:       scopes,
-			Endpoint:     Endpoint,
-		}
-		tok := &oauth2.Token{RefreshToken: f.RefreshToken}
-		return cfg.TokenSource(ctx, tok), nil
-	case "":
-		return nil, errors.New("missing 'type' field in credentials")
-	default:
-		return nil, fmt.Errorf("unknown credential type: %q", f.Type)
-	}
-}
-
-// ComputeTokenSource returns a token source that fetches access tokens
-// from Google Compute Engine (GCE)'s metadata server. It's only valid to use
-// this token source if your program is running on a GCE instance.
-// If no account is specified, "default" is used.
-// Further information about retrieving access tokens from the GCE metadata
-// server can be found at https://cloud.google.com/compute/docs/authentication.
-func ComputeTokenSource(account string) oauth2.TokenSource {
-	return oauth2.ReuseTokenSource(nil, computeSource{account: account})
-}
-
-type computeSource struct {
-	account string
-}
-
-func (cs computeSource) Token() (*oauth2.Token, error) {
-	if !metadata.OnGCE() {
-		return nil, errors.New("oauth2/google: can't get a token from the metadata service; not running on GCE")
-	}
-	acct := cs.account
-	if acct == "" {
-		acct = "default"
-	}
-	tokenJSON, err := metadata.Get("instance/service-accounts/" + acct + "/token")
-	if err != nil {
-		return nil, err
-	}
-	var res struct {
-		AccessToken  string `json:"access_token"`
-		ExpiresInSec int    `json:"expires_in"`
-		TokenType    string `json:"token_type"`
-	}
-	err = json.NewDecoder(strings.NewReader(tokenJSON)).Decode(&res)
-	if err != nil {
-		return nil, fmt.Errorf("oauth2/google: invalid token JSON from metadata: %v", err)
-	}
-	if res.ExpiresInSec == 0 || res.AccessToken == "" {
-		return nil, fmt.Errorf("oauth2/google: incomplete token received from metadata")
-	}
-	return &oauth2.Token{
-		AccessToken: res.AccessToken,
-		TokenType:   res.TokenType,
-		Expiry:      time.Now().Add(time.Duration(res.ExpiresInSec) * time.Second),
-	}, nil
-}
diff --git a/vendor/golang.org/x/oauth2/google/google_test.go b/vendor/golang.org/x/oauth2/google/google_test.go
deleted file mode 100644
index 287c699..0000000
--- a/vendor/golang.org/x/oauth2/google/google_test.go
+++ /dev/null
@@ -1,116 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package google
-
-import (
-	"strings"
-	"testing"
-)
-
-var webJSONKey = []byte(`
-{
-    "web": {
-        "auth_uri": "https://google.com/o/oauth2/auth",
-        "client_secret": "3Oknc4jS_wA2r9i",
-        "token_uri": "https://google.com/o/oauth2/token",
-        "client_email": "222-nprqovg5k43uum874cs9osjt2koe97g8@developer.gserviceaccount.com",
-        "redirect_uris": ["https://www.example.com/oauth2callback"],
-        "client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/222-nprqovg5k43uum874cs9osjt2koe97g8@developer.gserviceaccount.com",
-        "client_id": "222-nprqovg5k43uum874cs9osjt2koe97g8.apps.googleusercontent.com",
-        "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
-        "javascript_origins": ["https://www.example.com"]
-    }
-}`)
-
-var installedJSONKey = []byte(`{
-  "installed": {
-      "client_id": "222-installed.apps.googleusercontent.com",
-      "redirect_uris": ["https://www.example.com/oauth2callback"]
-    }
-}`)
-
-var jwtJSONKey = []byte(`{
-  "private_key_id": "268f54e43a1af97cfc71731688434f45aca15c8b",
-  "private_key": "super secret key",
-  "client_email": "gopher@developer.gserviceaccount.com",
-  "client_id": "gopher.apps.googleusercontent.com",
-  "token_uri": "https://accounts.google.com/o/gophers/token",
-  "type": "service_account"
-}`)
-
-var jwtJSONKeyNoTokenURL = []byte(`{
-  "private_key_id": "268f54e43a1af97cfc71731688434f45aca15c8b",
-  "private_key": "super secret key",
-  "client_email": "gopher@developer.gserviceaccount.com",
-  "client_id": "gopher.apps.googleusercontent.com",
-  "type": "service_account"
-}`)
-
-func TestConfigFromJSON(t *testing.T) {
-	conf, err := ConfigFromJSON(webJSONKey, "scope1", "scope2")
-	if err != nil {
-		t.Error(err)
-	}
-	if got, want := conf.ClientID, "222-nprqovg5k43uum874cs9osjt2koe97g8.apps.googleusercontent.com"; got != want {
-		t.Errorf("ClientID = %q; want %q", got, want)
-	}
-	if got, want := conf.ClientSecret, "3Oknc4jS_wA2r9i"; got != want {
-		t.Errorf("ClientSecret = %q; want %q", got, want)
-	}
-	if got, want := conf.RedirectURL, "https://www.example.com/oauth2callback"; got != want {
-		t.Errorf("RedictURL = %q; want %q", got, want)
-	}
-	if got, want := strings.Join(conf.Scopes, ","), "scope1,scope2"; got != want {
-		t.Errorf("Scopes = %q; want %q", got, want)
-	}
-	if got, want := conf.Endpoint.AuthURL, "https://google.com/o/oauth2/auth"; got != want {
-		t.Errorf("AuthURL = %q; want %q", got, want)
-	}
-	if got, want := conf.Endpoint.TokenURL, "https://google.com/o/oauth2/token"; got != want {
-		t.Errorf("TokenURL = %q; want %q", got, want)
-	}
-}
-
-func TestConfigFromJSON_Installed(t *testing.T) {
-	conf, err := ConfigFromJSON(installedJSONKey)
-	if err != nil {
-		t.Error(err)
-	}
-	if got, want := conf.ClientID, "222-installed.apps.googleusercontent.com"; got != want {
-		t.Errorf("ClientID = %q; want %q", got, want)
-	}
-}
-
-func TestJWTConfigFromJSON(t *testing.T) {
-	conf, err := JWTConfigFromJSON(jwtJSONKey, "scope1", "scope2")
-	if err != nil {
-		t.Fatal(err)
-	}
-	if got, want := conf.Email, "gopher@developer.gserviceaccount.com"; got != want {
-		t.Errorf("Email = %q, want %q", got, want)
-	}
-	if got, want := string(conf.PrivateKey), "super secret key"; got != want {
-		t.Errorf("PrivateKey = %q, want %q", got, want)
-	}
-	if got, want := conf.PrivateKeyID, "268f54e43a1af97cfc71731688434f45aca15c8b"; got != want {
-		t.Errorf("PrivateKeyID = %q, want %q", got, want)
-	}
-	if got, want := strings.Join(conf.Scopes, ","), "scope1,scope2"; got != want {
-		t.Errorf("Scopes = %q; want %q", got, want)
-	}
-	if got, want := conf.TokenURL, "https://accounts.google.com/o/gophers/token"; got != want {
-		t.Errorf("TokenURL = %q; want %q", got, want)
-	}
-}
-
-func TestJWTConfigFromJSONNoTokenURL(t *testing.T) {
-	conf, err := JWTConfigFromJSON(jwtJSONKeyNoTokenURL, "scope1", "scope2")
-	if err != nil {
-		t.Fatal(err)
-	}
-	if got, want := conf.TokenURL, "https://accounts.google.com/o/oauth2/token"; got != want {
-		t.Errorf("TokenURL = %q; want %q", got, want)
-	}
-}
diff --git a/vendor/golang.org/x/oauth2/google/jwt.go b/vendor/golang.org/x/oauth2/google/jwt.go
deleted file mode 100644
index b0fdb3a..0000000
--- a/vendor/golang.org/x/oauth2/google/jwt.go
+++ /dev/null
@@ -1,74 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package google
-
-import (
-	"crypto/rsa"
-	"fmt"
-	"time"
-
-	"golang.org/x/oauth2"
-	"golang.org/x/oauth2/internal"
-	"golang.org/x/oauth2/jws"
-)
-
-// JWTAccessTokenSourceFromJSON uses a Google Developers service account JSON
-// key file to read the credentials that authorize and authenticate the
-// requests, and returns a TokenSource that does not use any OAuth2 flow but
-// instead creates a JWT and sends that as the access token.
-// The audience is typically a URL that specifies the scope of the credentials.
-//
-// Note that this is not a standard OAuth flow, but rather an
-// optimization supported by a few Google services.
-// Unless you know otherwise, you should use JWTConfigFromJSON instead.
-func JWTAccessTokenSourceFromJSON(jsonKey []byte, audience string) (oauth2.TokenSource, error) {
-	cfg, err := JWTConfigFromJSON(jsonKey)
-	if err != nil {
-		return nil, fmt.Errorf("google: could not parse JSON key: %v", err)
-	}
-	pk, err := internal.ParseKey(cfg.PrivateKey)
-	if err != nil {
-		return nil, fmt.Errorf("google: could not parse key: %v", err)
-	}
-	ts := &jwtAccessTokenSource{
-		email:    cfg.Email,
-		audience: audience,
-		pk:       pk,
-		pkID:     cfg.PrivateKeyID,
-	}
-	tok, err := ts.Token()
-	if err != nil {
-		return nil, err
-	}
-	return oauth2.ReuseTokenSource(tok, ts), nil
-}
-
-type jwtAccessTokenSource struct {
-	email, audience string
-	pk              *rsa.PrivateKey
-	pkID            string
-}
-
-func (ts *jwtAccessTokenSource) Token() (*oauth2.Token, error) {
-	iat := time.Now()
-	exp := iat.Add(time.Hour)
-	cs := &jws.ClaimSet{
-		Iss: ts.email,
-		Sub: ts.email,
-		Aud: ts.audience,
-		Iat: iat.Unix(),
-		Exp: exp.Unix(),
-	}
-	hdr := &jws.Header{
-		Algorithm: "RS256",
-		Typ:       "JWT",
-		KeyID:     string(ts.pkID),
-	}
-	msg, err := jws.Encode(hdr, cs, ts.pk)
-	if err != nil {
-		return nil, fmt.Errorf("google: could not encode JWT: %v", err)
-	}
-	return &oauth2.Token{AccessToken: msg, TokenType: "Bearer", Expiry: exp}, nil
-}
diff --git a/vendor/golang.org/x/oauth2/google/jwt_test.go b/vendor/golang.org/x/oauth2/google/jwt_test.go
deleted file mode 100644
index f844436..0000000
--- a/vendor/golang.org/x/oauth2/google/jwt_test.go
+++ /dev/null
@@ -1,91 +0,0 @@
-// Copyright 2016 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package google
-
-import (
-	"bytes"
-	"crypto/rand"
-	"crypto/rsa"
-	"crypto/x509"
-	"encoding/base64"
-	"encoding/json"
-	"encoding/pem"
-	"strings"
-	"testing"
-	"time"
-
-	"golang.org/x/oauth2/jws"
-)
-
-func TestJWTAccessTokenSourceFromJSON(t *testing.T) {
-	// Generate a key we can use in the test data.
-	privateKey, err := rsa.GenerateKey(rand.Reader, 2048)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	// Encode the key and substitute into our example JSON.
-	enc := pem.EncodeToMemory(&pem.Block{
-		Type:  "PRIVATE KEY",
-		Bytes: x509.MarshalPKCS1PrivateKey(privateKey),
-	})
-	enc, err = json.Marshal(string(enc))
-	if err != nil {
-		t.Fatalf("json.Marshal: %v", err)
-	}
-	jsonKey := bytes.Replace(jwtJSONKey, []byte(`"super secret key"`), enc, 1)
-
-	ts, err := JWTAccessTokenSourceFromJSON(jsonKey, "audience")
-	if err != nil {
-		t.Fatalf("JWTAccessTokenSourceFromJSON: %v\nJSON: %s", err, string(jsonKey))
-	}
-
-	tok, err := ts.Token()
-	if err != nil {
-		t.Fatalf("Token: %v", err)
-	}
-
-	if got, want := tok.TokenType, "Bearer"; got != want {
-		t.Errorf("TokenType = %q, want %q", got, want)
-	}
-	if got := tok.Expiry; tok.Expiry.Before(time.Now()) {
-		t.Errorf("Expiry = %v, should not be expired", got)
-	}
-
-	err = jws.Verify(tok.AccessToken, &privateKey.PublicKey)
-	if err != nil {
-		t.Errorf("jws.Verify on AccessToken: %v", err)
-	}
-
-	claim, err := jws.Decode(tok.AccessToken)
-	if err != nil {
-		t.Fatalf("jws.Decode on AccessToken: %v", err)
-	}
-
-	if got, want := claim.Iss, "gopher@developer.gserviceaccount.com"; got != want {
-		t.Errorf("Iss = %q, want %q", got, want)
-	}
-	if got, want := claim.Sub, "gopher@developer.gserviceaccount.com"; got != want {
-		t.Errorf("Sub = %q, want %q", got, want)
-	}
-	if got, want := claim.Aud, "audience"; got != want {
-		t.Errorf("Aud = %q, want %q", got, want)
-	}
-
-	// Finally, check the header private key.
-	parts := strings.Split(tok.AccessToken, ".")
-	hdrJSON, err := base64.RawURLEncoding.DecodeString(parts[0])
-	if err != nil {
-		t.Fatalf("base64 DecodeString: %v\nString: %q", err, parts[0])
-	}
-	var hdr jws.Header
-	if err := json.Unmarshal([]byte(hdrJSON), &hdr); err != nil {
-		t.Fatalf("json.Unmarshal: %v (%q)", err, hdrJSON)
-	}
-
-	if got, want := hdr.KeyID, "268f54e43a1af97cfc71731688434f45aca15c8b"; got != want {
-		t.Errorf("Header KeyID = %q, want %q", got, want)
-	}
-}
diff --git a/vendor/golang.org/x/oauth2/google/not_go19.go b/vendor/golang.org/x/oauth2/google/not_go19.go
deleted file mode 100644
index 544e406..0000000
--- a/vendor/golang.org/x/oauth2/google/not_go19.go
+++ /dev/null
@@ -1,54 +0,0 @@
-// Copyright 2018 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build !go1.9
-
-package google
-
-import (
-	"golang.org/x/net/context"
-	"golang.org/x/oauth2"
-)
-
-// DefaultCredentials holds Google credentials, including "Application Default Credentials".
-// For more details, see:
-// https://developers.google.com/accounts/docs/application-default-credentials
-type DefaultCredentials struct {
-	ProjectID   string // may be empty
-	TokenSource oauth2.TokenSource
-
-	// JSON contains the raw bytes from a JSON credentials file.
-	// This field may be nil if authentication is provided by the
-	// environment and not with a credentials file, e.g. when code is
-	// running on Google Cloud Platform.
-	JSON []byte
-}
-
-// FindDefaultCredentials searches for "Application Default Credentials".
-//
-// It looks for credentials in the following places,
-// preferring the first location found:
-//
-//   1. A JSON file whose path is specified by the
-//      GOOGLE_APPLICATION_CREDENTIALS environment variable.
-//   2. A JSON file in a location known to the gcloud command-line tool.
-//      On Windows, this is %APPDATA%/gcloud/application_default_credentials.json.
-//      On other systems, $HOME/.config/gcloud/application_default_credentials.json.
-//   3. On Google App Engine it uses the appengine.AccessToken function.
-//   4. On Google Compute Engine and Google App Engine Managed VMs, it fetches
-//      credentials from the metadata server.
-//      (In this final case any provided scopes are ignored.)
-func FindDefaultCredentials(ctx context.Context, scopes ...string) (*DefaultCredentials, error) {
-	return findDefaultCredentials(ctx, scopes)
-}
-
-// CredentialsFromJSON obtains Google credentials from a JSON value. The JSON can
-// represent either a Google Developers Console client_credentials.json file (as in
-// ConfigFromJSON) or a Google Developers service account key file (as in
-// JWTConfigFromJSON).
-//
-// Note: despite the name, the returned credentials may not be Application Default Credentials.
-func CredentialsFromJSON(ctx context.Context, jsonData []byte, scopes ...string) (*DefaultCredentials, error) {
-	return credentialsFromJSON(ctx, jsonData, scopes)
-}
diff --git a/vendor/golang.org/x/oauth2/google/sdk.go b/vendor/golang.org/x/oauth2/google/sdk.go
deleted file mode 100644
index b9660ca..0000000
--- a/vendor/golang.org/x/oauth2/google/sdk.go
+++ /dev/null
@@ -1,201 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package google
-
-import (
-	"bufio"
-	"encoding/json"
-	"errors"
-	"fmt"
-	"io"
-	"net/http"
-	"os"
-	"os/user"
-	"path/filepath"
-	"runtime"
-	"strings"
-	"time"
-
-	"golang.org/x/net/context"
-	"golang.org/x/oauth2"
-)
-
-type sdkCredentials struct {
-	Data []struct {
-		Credential struct {
-			ClientID     string     `json:"client_id"`
-			ClientSecret string     `json:"client_secret"`
-			AccessToken  string     `json:"access_token"`
-			RefreshToken string     `json:"refresh_token"`
-			TokenExpiry  *time.Time `json:"token_expiry"`
-		} `json:"credential"`
-		Key struct {
-			Account string `json:"account"`
-			Scope   string `json:"scope"`
-		} `json:"key"`
-	}
-}
-
-// An SDKConfig provides access to tokens from an account already
-// authorized via the Google Cloud SDK.
-type SDKConfig struct {
-	conf         oauth2.Config
-	initialToken *oauth2.Token
-}
-
-// NewSDKConfig creates an SDKConfig for the given Google Cloud SDK
-// account. If account is empty, the account currently active in
-// Google Cloud SDK properties is used.
-// Google Cloud SDK credentials must be created by running `gcloud auth`
-// before using this function.
-// The Google Cloud SDK is available at https://cloud.google.com/sdk/.
-func NewSDKConfig(account string) (*SDKConfig, error) {
-	configPath, err := sdkConfigPath()
-	if err != nil {
-		return nil, fmt.Errorf("oauth2/google: error getting SDK config path: %v", err)
-	}
-	credentialsPath := filepath.Join(configPath, "credentials")
-	f, err := os.Open(credentialsPath)
-	if err != nil {
-		return nil, fmt.Errorf("oauth2/google: failed to load SDK credentials: %v", err)
-	}
-	defer f.Close()
-
-	var c sdkCredentials
-	if err := json.NewDecoder(f).Decode(&c); err != nil {
-		return nil, fmt.Errorf("oauth2/google: failed to decode SDK credentials from %q: %v", credentialsPath, err)
-	}
-	if len(c.Data) == 0 {
-		return nil, fmt.Errorf("oauth2/google: no credentials found in %q, run `gcloud auth login` to create one", credentialsPath)
-	}
-	if account == "" {
-		propertiesPath := filepath.Join(configPath, "properties")
-		f, err := os.Open(propertiesPath)
-		if err != nil {
-			return nil, fmt.Errorf("oauth2/google: failed to load SDK properties: %v", err)
-		}
-		defer f.Close()
-		ini, err := parseINI(f)
-		if err != nil {
-			return nil, fmt.Errorf("oauth2/google: failed to parse SDK properties %q: %v", propertiesPath, err)
-		}
-		core, ok := ini["core"]
-		if !ok {
-			return nil, fmt.Errorf("oauth2/google: failed to find [core] section in %v", ini)
-		}
-		active, ok := core["account"]
-		if !ok {
-			return nil, fmt.Errorf("oauth2/google: failed to find %q attribute in %v", "account", core)
-		}
-		account = active
-	}
-
-	for _, d := range c.Data {
-		if account == "" || d.Key.Account == account {
-			if d.Credential.AccessToken == "" && d.Credential.RefreshToken == "" {
-				return nil, fmt.Errorf("oauth2/google: no token available for account %q", account)
-			}
-			var expiry time.Time
-			if d.Credential.TokenExpiry != nil {
-				expiry = *d.Credential.TokenExpiry
-			}
-			return &SDKConfig{
-				conf: oauth2.Config{
-					ClientID:     d.Credential.ClientID,
-					ClientSecret: d.Credential.ClientSecret,
-					Scopes:       strings.Split(d.Key.Scope, " "),
-					Endpoint:     Endpoint,
-					RedirectURL:  "oob",
-				},
-				initialToken: &oauth2.Token{
-					AccessToken:  d.Credential.AccessToken,
-					RefreshToken: d.Credential.RefreshToken,
-					Expiry:       expiry,
-				},
-			}, nil
-		}
-	}
-	return nil, fmt.Errorf("oauth2/google: no such credentials for account %q", account)
-}
-
-// Client returns an HTTP client using Google Cloud SDK credentials to
-// authorize requests. The token will auto-refresh as necessary. The
-// underlying http.RoundTripper will be obtained using the provided
-// context. The returned client and its Transport should not be
-// modified.
-func (c *SDKConfig) Client(ctx context.Context) *http.Client {
-	return &http.Client{
-		Transport: &oauth2.Transport{
-			Source: c.TokenSource(ctx),
-		},
-	}
-}
-
-// TokenSource returns an oauth2.TokenSource that retrieve tokens from
-// Google Cloud SDK credentials using the provided context.
-// It will returns the current access token stored in the credentials,
-// and refresh it when it expires, but it won't update the credentials
-// with the new access token.
-func (c *SDKConfig) TokenSource(ctx context.Context) oauth2.TokenSource {
-	return c.conf.TokenSource(ctx, c.initialToken)
-}
-
-// Scopes are the OAuth 2.0 scopes the current account is authorized for.
-func (c *SDKConfig) Scopes() []string {
-	return c.conf.Scopes
-}
-
-func parseINI(ini io.Reader) (map[string]map[string]string, error) {
-	result := map[string]map[string]string{
-		"": {}, // root section
-	}
-	scanner := bufio.NewScanner(ini)
-	currentSection := ""
-	for scanner.Scan() {
-		line := strings.TrimSpace(scanner.Text())
-		if strings.HasPrefix(line, ";") {
-			// comment.
-			continue
-		}
-		if strings.HasPrefix(line, "[") && strings.HasSuffix(line, "]") {
-			currentSection = strings.TrimSpace(line[1 : len(line)-1])
-			result[currentSection] = map[string]string{}
-			continue
-		}
-		parts := strings.SplitN(line, "=", 2)
-		if len(parts) == 2 && parts[0] != "" {
-			result[currentSection][strings.TrimSpace(parts[0])] = strings.TrimSpace(parts[1])
-		}
-	}
-	if err := scanner.Err(); err != nil {
-		return nil, fmt.Errorf("error scanning ini: %v", err)
-	}
-	return result, nil
-}
-
-// sdkConfigPath tries to guess where the gcloud config is located.
-// It can be overridden during tests.
-var sdkConfigPath = func() (string, error) {
-	if runtime.GOOS == "windows" {
-		return filepath.Join(os.Getenv("APPDATA"), "gcloud"), nil
-	}
-	homeDir := guessUnixHomeDir()
-	if homeDir == "" {
-		return "", errors.New("unable to get current user home directory: os/user lookup failed; $HOME is empty")
-	}
-	return filepath.Join(homeDir, ".config", "gcloud"), nil
-}
-
-func guessUnixHomeDir() string {
-	// Prefer $HOME over user.Current due to glibc bug: golang.org/issue/13470
-	if v := os.Getenv("HOME"); v != "" {
-		return v
-	}
-	// Else, fall back to user.Current:
-	if u, err := user.Current(); err == nil {
-		return u.HomeDir
-	}
-	return ""
-}
diff --git a/vendor/golang.org/x/oauth2/google/sdk_test.go b/vendor/golang.org/x/oauth2/google/sdk_test.go
deleted file mode 100644
index 52b8eca..0000000
--- a/vendor/golang.org/x/oauth2/google/sdk_test.go
+++ /dev/null
@@ -1,107 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package google
-
-import (
-	"reflect"
-	"strings"
-	"testing"
-)
-
-func TestSDKConfig(t *testing.T) {
-	sdkConfigPath = func() (string, error) {
-		return "testdata/gcloud", nil
-	}
-
-	tests := []struct {
-		account     string
-		accessToken string
-		err         bool
-	}{
-		{"", "bar_access_token", false},
-		{"foo@example.com", "foo_access_token", false},
-		{"bar@example.com", "bar_access_token", false},
-		{"baz@serviceaccount.example.com", "", true},
-	}
-	for _, tt := range tests {
-		c, err := NewSDKConfig(tt.account)
-		if got, want := err != nil, tt.err; got != want {
-			if !tt.err {
-				t.Errorf("got %v, want nil", err)
-			} else {
-				t.Errorf("got nil, want error")
-			}
-			continue
-		}
-		if err != nil {
-			continue
-		}
-		tok := c.initialToken
-		if tok == nil {
-			t.Errorf("got nil, want %q", tt.accessToken)
-			continue
-		}
-		if tok.AccessToken != tt.accessToken {
-			t.Errorf("got %q, want %q", tok.AccessToken, tt.accessToken)
-		}
-	}
-}
-
-func TestParseINI(t *testing.T) {
-	tests := []struct {
-		ini  string
-		want map[string]map[string]string
-	}{
-		{
-			`root = toor
-[foo]
-bar = hop
-ini = nin
-`,
-			map[string]map[string]string{
-				"":    {"root": "toor"},
-				"foo": {"bar": "hop", "ini": "nin"},
-			},
-		},
-		{
-			"\t  extra \t =  whitespace  \t\r\n \t [everywhere] \t \r\n  here \t =  \t there  \t \r\n",
-			map[string]map[string]string{
-				"":           {"extra": "whitespace"},
-				"everywhere": {"here": "there"},
-			},
-		},
-		{
-			`[empty]
-[section]
-empty=
-`,
-			map[string]map[string]string{
-				"":        {},
-				"empty":   {},
-				"section": {"empty": ""},
-			},
-		},
-		{
-			`ignore
-[invalid
-=stuff
-;comment=true
-`,
-			map[string]map[string]string{
-				"": {},
-			},
-		},
-	}
-	for _, tt := range tests {
-		result, err := parseINI(strings.NewReader(tt.ini))
-		if err != nil {
-			t.Errorf("parseINI(%q) error %v, want: no error", tt.ini, err)
-			continue
-		}
-		if !reflect.DeepEqual(result, tt.want) {
-			t.Errorf("parseINI(%q) = %#v, want: %#v", tt.ini, result, tt.want)
-		}
-	}
-}
diff --git a/vendor/golang.org/x/oauth2/google/testdata/gcloud/credentials b/vendor/golang.org/x/oauth2/google/testdata/gcloud/credentials
deleted file mode 100644
index ff5eefb..0000000
--- a/vendor/golang.org/x/oauth2/google/testdata/gcloud/credentials
+++ /dev/null
@@ -1,122 +0,0 @@
-{
-  "data": [
-    {
-      "credential": {
-        "_class": "OAuth2Credentials",
-        "_module": "oauth2client.client",
-        "access_token": "foo_access_token",
-        "client_id": "foo_client_id",
-        "client_secret": "foo_client_secret",
-        "id_token": {
-          "at_hash": "foo_at_hash",
-          "aud": "foo_aud",
-          "azp": "foo_azp",
-          "cid": "foo_cid",
-          "email": "foo@example.com",
-          "email_verified": true,
-          "exp": 1420573614,
-          "iat": 1420569714,
-          "id": "1337",
-          "iss": "accounts.google.com",
-          "sub": "1337",
-          "token_hash": "foo_token_hash",
-          "verified_email": true
-        },
-        "invalid": false,
-        "refresh_token": "foo_refresh_token",
-        "revoke_uri": "https://accounts.google.com/o/oauth2/revoke",
-        "token_expiry": "2015-01-09T00:51:51Z",
-        "token_response": {
-          "access_token": "foo_access_token",
-          "expires_in": 3600,
-          "id_token": "foo_id_token",
-          "token_type": "Bearer"
-        },
-        "token_uri": "https://accounts.google.com/o/oauth2/token",
-        "user_agent": "Cloud SDK Command Line Tool"
-      },
-      "key": {
-        "account": "foo@example.com",
-        "clientId": "foo_client_id",
-        "scope": "https://www.googleapis.com/auth/appengine.admin https://www.googleapis.com/auth/bigquery https://www.googleapis.com/auth/compute https://www.googleapis.com/auth/devstorage.full_control https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/ndev.cloudman https://www.googleapis.com/auth/cloud-platform https://www.googleapis.com/auth/sqlservice.admin https://www.googleapis.com/auth/prediction https://www.googleapis.com/auth/projecthosting",
-        "type": "google-cloud-sdk"
-      }
-    },
-    {
-      "credential": {
-        "_class": "OAuth2Credentials",
-        "_module": "oauth2client.client",
-        "access_token": "bar_access_token",
-        "client_id": "bar_client_id",
-        "client_secret": "bar_client_secret",
-        "id_token": {
-          "at_hash": "bar_at_hash",
-          "aud": "bar_aud",
-          "azp": "bar_azp",
-          "cid": "bar_cid",
-          "email": "bar@example.com",
-          "email_verified": true,
-          "exp": 1420573614,
-          "iat": 1420569714,
-          "id": "1337",
-          "iss": "accounts.google.com",
-          "sub": "1337",
-          "token_hash": "bar_token_hash",
-          "verified_email": true
-        },
-        "invalid": false,
-        "refresh_token": "bar_refresh_token",
-        "revoke_uri": "https://accounts.google.com/o/oauth2/revoke",
-        "token_expiry": "2015-01-09T00:51:51Z",
-        "token_response": {
-          "access_token": "bar_access_token",
-          "expires_in": 3600,
-          "id_token": "bar_id_token",
-          "token_type": "Bearer"
-        },
-        "token_uri": "https://accounts.google.com/o/oauth2/token",
-        "user_agent": "Cloud SDK Command Line Tool"
-      },
-      "key": {
-        "account": "bar@example.com",
-        "clientId": "bar_client_id",
-        "scope": "https://www.googleapis.com/auth/appengine.admin https://www.googleapis.com/auth/bigquery https://www.googleapis.com/auth/compute https://www.googleapis.com/auth/devstorage.full_control https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/ndev.cloudman https://www.googleapis.com/auth/cloud-platform https://www.googleapis.com/auth/sqlservice.admin https://www.googleapis.com/auth/prediction https://www.googleapis.com/auth/projecthosting",
-        "type": "google-cloud-sdk"
-      }
-    },
-    {
-      "credential": {
-        "_class": "ServiceAccountCredentials",
-        "_kwargs": {},
-        "_module": "oauth2client.client",
-        "_private_key_id": "00000000000000000000000000000000",
-        "_private_key_pkcs8_text": "-----BEGIN RSA PRIVATE KEY-----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\nS1dcnKiPxaED7W/y6LJiuBT2rbZiQ2L93NJpFZD/UA==\n-----END RSA PRIVATE KEY-----\n",
-        "_revoke_uri": "https://accounts.google.com/o/oauth2/revoke",
-        "_scopes": "https://www.googleapis.com/auth/appengine.admin https://www.googleapis.com/auth/bigquery https://www.googleapis.com/auth/compute https://www.googleapis.com/auth/devstorage.full_control https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/ndev.cloudman https://www.googleapis.com/auth/cloud-platform https://www.googleapis.com/auth/sqlservice.admin https://www.googleapis.com/auth/prediction https://www.googleapis.com/auth/projecthosting",
-        "_service_account_email": "baz@serviceaccount.example.com",
-        "_service_account_id": "baz.serviceaccount.example.com",
-        "_token_uri": "https://accounts.google.com/o/oauth2/token",
-        "_user_agent": "Cloud SDK Command Line Tool",
-        "access_token": null,
-        "assertion_type": null,
-        "client_id": null,
-        "client_secret": null,
-        "id_token": null,
-        "invalid": false,
-        "refresh_token": null,
-        "revoke_uri": "https://accounts.google.com/o/oauth2/revoke",
-        "service_account_name": "baz@serviceaccount.example.com",
-        "token_expiry": null,
-        "token_response": null,
-        "user_agent": "Cloud SDK Command Line Tool"
-      },
-      "key": {
-        "account": "baz@serviceaccount.example.com",
-        "clientId": "baz_client_id",
-        "scope": "https://www.googleapis.com/auth/appengine.admin https://www.googleapis.com/auth/bigquery https://www.googleapis.com/auth/compute https://www.googleapis.com/auth/devstorage.full_control https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/ndev.cloudman https://www.googleapis.com/auth/cloud-platform https://www.googleapis.com/auth/sqlservice.admin https://www.googleapis.com/auth/prediction https://www.googleapis.com/auth/projecthosting",
-        "type": "google-cloud-sdk"
-      }
-    }
-  ],
-  "file_version": 1
-}
diff --git a/vendor/golang.org/x/oauth2/google/testdata/gcloud/properties b/vendor/golang.org/x/oauth2/google/testdata/gcloud/properties
deleted file mode 100644
index 025de88..0000000
--- a/vendor/golang.org/x/oauth2/google/testdata/gcloud/properties
+++ /dev/null
@@ -1,2 +0,0 @@
-[core]
-account = bar@example.com
\ No newline at end of file
diff --git a/vendor/golang.org/x/oauth2/heroku/heroku.go b/vendor/golang.org/x/oauth2/heroku/heroku.go
deleted file mode 100644
index 5b4fdb8..0000000
--- a/vendor/golang.org/x/oauth2/heroku/heroku.go
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2016 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package heroku provides constants for using OAuth2 to access Heroku.
-package heroku // import "golang.org/x/oauth2/heroku"
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is Heroku's OAuth 2.0 endpoint.
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://id.heroku.com/oauth/authorize",
-	TokenURL: "https://id.heroku.com/oauth/token",
-}
diff --git a/vendor/golang.org/x/oauth2/hipchat/hipchat.go b/vendor/golang.org/x/oauth2/hipchat/hipchat.go
deleted file mode 100644
index 594fe07..0000000
--- a/vendor/golang.org/x/oauth2/hipchat/hipchat.go
+++ /dev/null
@@ -1,60 +0,0 @@
-// Copyright 2016 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package hipchat provides constants for using OAuth2 to access HipChat.
-package hipchat // import "golang.org/x/oauth2/hipchat"
-
-import (
-	"encoding/json"
-	"errors"
-
-	"golang.org/x/oauth2"
-	"golang.org/x/oauth2/clientcredentials"
-)
-
-// Endpoint is HipChat's OAuth 2.0 endpoint.
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://www.hipchat.com/users/authorize",
-	TokenURL: "https://api.hipchat.com/v2/oauth/token",
-}
-
-// ServerEndpoint returns a new oauth2.Endpoint for a HipChat Server instance
-// running on the given domain or host.
-func ServerEndpoint(host string) oauth2.Endpoint {
-	return oauth2.Endpoint{
-		AuthURL:  "https://" + host + "/users/authorize",
-		TokenURL: "https://" + host + "/v2/oauth/token",
-	}
-}
-
-// ClientCredentialsConfigFromCaps generates a Config from a HipChat API
-// capabilities descriptor. It does not verify the scopes against the
-// capabilities document at this time.
-//
-// For more information see: https://www.hipchat.com/docs/apiv2/method/get_capabilities
-func ClientCredentialsConfigFromCaps(capsJSON []byte, clientID, clientSecret string, scopes ...string) (*clientcredentials.Config, error) {
-	var caps struct {
-		Caps struct {
-			Endpoint struct {
-				TokenURL string `json:"tokenUrl"`
-			} `json:"oauth2Provider"`
-		} `json:"capabilities"`
-	}
-
-	if err := json.Unmarshal(capsJSON, &caps); err != nil {
-		return nil, err
-	}
-
-	// Verify required fields.
-	if caps.Caps.Endpoint.TokenURL == "" {
-		return nil, errors.New("oauth2/hipchat: missing OAuth2 token URL in the capabilities descriptor JSON")
-	}
-
-	return &clientcredentials.Config{
-		ClientID:     clientID,
-		ClientSecret: clientSecret,
-		Scopes:       scopes,
-		TokenURL:     caps.Caps.Endpoint.TokenURL,
-	}, nil
-}
diff --git a/vendor/golang.org/x/oauth2/internal/token.go b/vendor/golang.org/x/oauth2/internal/token.go
index 999e668..5c5451a 100644
--- a/vendor/golang.org/x/oauth2/internal/token.go
+++ b/vendor/golang.org/x/oauth2/internal/token.go
@@ -103,6 +103,7 @@ var brokenAuthHeaderProviders = []string{
 	"https://api.twitch.tv/",
 	"https://id.twitch.tv/",
 	"https://app.box.com/",
+	"https://api.box.com/",
 	"https://connect.stripe.com/",
 	"https://login.mailchimp.com/",
 	"https://login.microsoftonline.com/",
@@ -130,6 +131,7 @@ var brokenAuthHeaderProviders = []string{
 	"https://multisport.todaysplan.com.au/rest/oauth/access_token",
 	"https://whats.todaysplan.com.au/rest/oauth/access_token",
 	"https://stackoverflow.com/oauth/access_token",
+	"https://account.health.nokia.com",
 }
 
 // brokenAuthHeaderDomains lists broken providers that issue dynamic endpoints.
diff --git a/vendor/golang.org/x/oauth2/internal/token_test.go b/vendor/golang.org/x/oauth2/internal/token_test.go
deleted file mode 100644
index 7b52e51..0000000
--- a/vendor/golang.org/x/oauth2/internal/token_test.go
+++ /dev/null
@@ -1,112 +0,0 @@
-// Copyright 2014 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package internal
-
-import (
-	"fmt"
-	"io"
-	"net/http"
-	"net/http/httptest"
-	"net/url"
-	"testing"
-
-	"golang.org/x/net/context"
-)
-
-func TestRegisterBrokenAuthHeaderProvider(t *testing.T) {
-	RegisterBrokenAuthHeaderProvider("https://aaa.com/")
-	tokenURL := "https://aaa.com/token"
-	if providerAuthHeaderWorks(tokenURL) {
-		t.Errorf("got %q as unbroken; want broken", tokenURL)
-	}
-}
-
-func TestRetrieveTokenBustedNoSecret(t *testing.T) {
-	const clientID = "client-id"
-
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if got, want := r.FormValue("client_id"), clientID; got != want {
-			t.Errorf("client_id = %q; want %q", got, want)
-		}
-		if got, want := r.FormValue("client_secret"), ""; got != want {
-			t.Errorf("client_secret = %q; want empty", got)
-		}
-		w.Header().Set("Content-Type", "application/json")
-		io.WriteString(w, `{"access_token": "ACCESS_TOKEN", "token_type": "bearer"}`)
-	}))
-	defer ts.Close()
-
-	RegisterBrokenAuthHeaderProvider(ts.URL)
-	_, err := RetrieveToken(context.Background(), clientID, "", ts.URL, url.Values{})
-	if err != nil {
-		t.Errorf("RetrieveToken = %v; want no error", err)
-	}
-}
-
-func Test_providerAuthHeaderWorks(t *testing.T) {
-	for _, p := range brokenAuthHeaderProviders {
-		if providerAuthHeaderWorks(p) {
-			t.Errorf("got %q as unbroken; want broken", p)
-		}
-		p := fmt.Sprintf("%ssomesuffix", p)
-		if providerAuthHeaderWorks(p) {
-			t.Errorf("got %q as unbroken; want broken", p)
-		}
-	}
-	p := "https://api.not-in-the-list-example.com/"
-	if !providerAuthHeaderWorks(p) {
-		t.Errorf("got %q as unbroken; want broken", p)
-	}
-}
-
-func TestProviderAuthHeaderWorksDomain(t *testing.T) {
-	tests := []struct {
-		tokenURL  string
-		wantWorks bool
-	}{
-		{"https://dev-12345.okta.com/token-url", false},
-		{"https://dev-12345.oktapreview.com/token-url", false},
-		{"https://dev-12345.okta.org/token-url", true},
-		{"https://foo.bar.force.com/token-url", false},
-		{"https://foo.force.com/token-url", false},
-		{"https://force.com/token-url", true},
-	}
-
-	for _, test := range tests {
-		got := providerAuthHeaderWorks(test.tokenURL)
-		if got != test.wantWorks {
-			t.Errorf("providerAuthHeaderWorks(%q) = %v; want %v", test.tokenURL, got, test.wantWorks)
-		}
-	}
-}
-
-func TestRetrieveTokenWithContexts(t *testing.T) {
-	const clientID = "client-id"
-
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
-		io.WriteString(w, `{"access_token": "ACCESS_TOKEN", "token_type": "bearer"}`)
-	}))
-	defer ts.Close()
-
-	_, err := RetrieveToken(context.Background(), clientID, "", ts.URL, url.Values{})
-	if err != nil {
-		t.Errorf("RetrieveToken (with background context) = %v; want no error", err)
-	}
-
-	retrieved := make(chan struct{})
-	cancellingts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		<-retrieved
-	}))
-	defer cancellingts.Close()
-
-	ctx, cancel := context.WithCancel(context.Background())
-	cancel()
-	_, err = RetrieveToken(ctx, clientID, "", cancellingts.URL, url.Values{})
-	close(retrieved)
-	if err == nil {
-		t.Errorf("RetrieveToken (with cancelled context) = nil; want error")
-	}
-}
diff --git a/vendor/golang.org/x/oauth2/jira/jira.go b/vendor/golang.org/x/oauth2/jira/jira.go
deleted file mode 100644
index 3441560..0000000
--- a/vendor/golang.org/x/oauth2/jira/jira.go
+++ /dev/null
@@ -1,167 +0,0 @@
-// Copyright 2018 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package jira provides claims and JWT signing for OAuth2 to access JIRA/Confluence.
-package jira
-
-import (
-	"context"
-	"crypto/hmac"
-	"crypto/sha256"
-	"encoding/base64"
-	"encoding/json"
-	"fmt"
-	"io"
-	"io/ioutil"
-	"net/http"
-	"net/url"
-	"strings"
-	"time"
-
-	"golang.org/x/oauth2"
-)
-
-// ClaimSet contains information about the JWT signature according
-// to Atlassian's documentation
-// https://developer.atlassian.com/cloud/jira/software/oauth-2-jwt-bearer-token-authorization-grant-type/
-type ClaimSet struct {
-	Issuer       string `json:"iss"`
-	Subject      string `json:"sub"`
-	InstalledURL string `json:"tnt"` // URL of installed app
-	AuthURL      string `json:"aud"` // URL of auth server
-	ExpiresIn    int64  `json:"exp"` // Must be no later that 60 seconds in the future
-	IssuedAt     int64  `json:"iat"`
-}
-
-var (
-	defaultGrantType = "urn:ietf:params:oauth:grant-type:jwt-bearer"
-	defaultHeader    = map[string]string{
-		"typ": "JWT",
-		"alg": "HS256",
-	}
-)
-
-// Config is the configuration for using JWT to fetch tokens,
-// commonly known as "two-legged OAuth 2.0".
-type Config struct {
-	// BaseURL for your app
-	BaseURL string
-
-	// Subject is the userkey as defined by Atlassian
-	// Different than username (ex: /rest/api/2/user?username=alex)
-	Subject string
-
-	oauth2.Config
-}
-
-// TokenSource returns a JWT TokenSource using the configuration
-// in c and the HTTP client from the provided context.
-func (c *Config) TokenSource(ctx context.Context) oauth2.TokenSource {
-	return oauth2.ReuseTokenSource(nil, jwtSource{ctx, c})
-}
-
-// Client returns an HTTP client wrapping the context's
-// HTTP transport and adding Authorization headers with tokens
-// obtained from c.
-//
-// The returned client and its Transport should not be modified.
-func (c *Config) Client(ctx context.Context) *http.Client {
-	return oauth2.NewClient(ctx, c.TokenSource(ctx))
-}
-
-// jwtSource is a source that always does a signed JWT request for a token.
-// It should typically be wrapped with a reuseTokenSource.
-type jwtSource struct {
-	ctx  context.Context
-	conf *Config
-}
-
-func (js jwtSource) Token() (*oauth2.Token, error) {
-	exp := time.Duration(59) * time.Second
-	claimSet := &ClaimSet{
-		Issuer:       fmt.Sprintf("urn:atlassian:connect:clientid:%s", js.conf.ClientID),
-		Subject:      fmt.Sprintf("urn:atlassian:connect:userkey:%s", js.conf.Subject),
-		InstalledURL: js.conf.BaseURL,
-		AuthURL:      js.conf.Endpoint.AuthURL,
-		IssuedAt:     time.Now().Unix(),
-		ExpiresIn:    time.Now().Add(exp).Unix(),
-	}
-
-	v := url.Values{}
-	v.Set("grant_type", defaultGrantType)
-
-	// Add scopes if they exist;  If not, it defaults to app scopes
-	if scopes := js.conf.Scopes; scopes != nil {
-		upperScopes := make([]string, len(scopes))
-		for i, k := range scopes {
-			upperScopes[i] = strings.ToUpper(k)
-		}
-		v.Set("scope", strings.Join(upperScopes, "+"))
-	}
-
-	// Sign claims for assertion
-	assertion, err := sign(js.conf.ClientSecret, claimSet)
-	if err != nil {
-		return nil, err
-	}
-	v.Set("assertion", string(assertion))
-
-	// Fetch access token from auth server
-	hc := oauth2.NewClient(js.ctx, nil)
-	resp, err := hc.PostForm(js.conf.Endpoint.TokenURL, v)
-	if err != nil {
-		return nil, fmt.Errorf("oauth2: cannot fetch token: %v", err)
-	}
-	defer resp.Body.Close()
-	body, err := ioutil.ReadAll(io.LimitReader(resp.Body, 1<<20))
-	if err != nil {
-		return nil, fmt.Errorf("oauth2: cannot fetch token: %v", err)
-	}
-	if c := resp.StatusCode; c < 200 || c > 299 {
-		return nil, fmt.Errorf("oauth2: cannot fetch token: %v\nResponse: %s", resp.Status, body)
-	}
-
-	// tokenRes is the JSON response body.
-	var tokenRes struct {
-		AccessToken string `json:"access_token"`
-		TokenType   string `json:"token_type"`
-		ExpiresIn   int64  `json:"expires_in"` // relative seconds from now
-	}
-	if err := json.Unmarshal(body, &tokenRes); err != nil {
-		return nil, fmt.Errorf("oauth2: cannot fetch token: %v", err)
-	}
-	token := &oauth2.Token{
-		AccessToken: tokenRes.AccessToken,
-		TokenType:   tokenRes.TokenType,
-	}
-
-	if secs := tokenRes.ExpiresIn; secs > 0 {
-		token.Expiry = time.Now().Add(time.Duration(secs) * time.Second)
-	}
-	return token, nil
-}
-
-// Sign the claim set with the shared secret
-// Result to be sent as assertion
-func sign(key string, claims *ClaimSet) (string, error) {
-	b, err := json.Marshal(defaultHeader)
-	if err != nil {
-		return "", err
-	}
-	header := base64.RawURLEncoding.EncodeToString(b)
-
-	jsonClaims, err := json.Marshal(claims)
-	if err != nil {
-		return "", err
-	}
-	encodedClaims := strings.TrimRight(base64.URLEncoding.EncodeToString(jsonClaims), "=")
-
-	ss := fmt.Sprintf("%s.%s", header, encodedClaims)
-
-	mac := hmac.New(sha256.New, []byte(key))
-	mac.Write([]byte(ss))
-	signature := mac.Sum(nil)
-
-	return fmt.Sprintf("%s.%s", ss, base64.RawURLEncoding.EncodeToString(signature)), nil
-}
diff --git a/vendor/golang.org/x/oauth2/jira/jira_test.go b/vendor/golang.org/x/oauth2/jira/jira_test.go
deleted file mode 100644
index c49940d..0000000
--- a/vendor/golang.org/x/oauth2/jira/jira_test.go
+++ /dev/null
@@ -1,185 +0,0 @@
-// Copyright 2018 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package jira
-
-import (
-	"context"
-	"encoding/base64"
-	"encoding/json"
-	"net/http"
-	"net/http/httptest"
-	"strings"
-	"testing"
-
-	"golang.org/x/oauth2"
-	"golang.org/x/oauth2/jws"
-)
-
-func TestJWTFetch_JSONResponse(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
-		w.Write([]byte(`{
-			"access_token": "90d64460d14870c08c81352a05dedd3465940a7c",
-			"token_type": "Bearer",
-			"expires_in": 3600
-		}`))
-	}))
-	defer ts.Close()
-
-	conf := &Config{
-		BaseURL: "https://my.app.com",
-		Subject: "userkey",
-		Config: oauth2.Config{
-			ClientID:     "super_secret_client_id",
-			ClientSecret: "super_shared_secret",
-			Scopes:       []string{"read", "write"},
-			Endpoint: oauth2.Endpoint{
-				AuthURL:  "https://example.com",
-				TokenURL: ts.URL,
-			},
-		},
-	}
-
-	tok, err := conf.TokenSource(context.Background()).Token()
-	if err != nil {
-		t.Fatal(err)
-	}
-	if !tok.Valid() {
-		t.Errorf("got invalid token: %v", tok)
-	}
-	if got, want := tok.AccessToken, "90d64460d14870c08c81352a05dedd3465940a7c"; got != want {
-		t.Errorf("access token = %q; want %q", got, want)
-	}
-	if got, want := tok.TokenType, "Bearer"; got != want {
-		t.Errorf("token type = %q; want %q", got, want)
-	}
-	if got := tok.Expiry.IsZero(); got {
-		t.Errorf("token expiry = %v, want none", got)
-	}
-}
-
-func TestJWTFetch_BadResponse(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
-		w.Write([]byte(`{"token_type": "Bearer"}`))
-	}))
-	defer ts.Close()
-
-	conf := &Config{
-		BaseURL: "https://my.app.com",
-		Subject: "userkey",
-		Config: oauth2.Config{
-			ClientID:     "super_secret_client_id",
-			ClientSecret: "super_shared_secret",
-			Scopes:       []string{"read", "write"},
-			Endpoint: oauth2.Endpoint{
-				AuthURL:  "https://example.com",
-				TokenURL: ts.URL,
-			},
-		},
-	}
-
-	tok, err := conf.TokenSource(context.Background()).Token()
-	if err != nil {
-		t.Fatal(err)
-	}
-	if tok == nil {
-		t.Fatalf("got nil token; want token")
-	}
-	if tok.Valid() {
-		t.Errorf("got invalid token: %v", tok)
-	}
-	if got, want := tok.AccessToken, ""; got != want {
-		t.Errorf("access token = %q; want %q", got, want)
-	}
-	if got, want := tok.TokenType, "Bearer"; got != want {
-		t.Errorf("token type = %q; want %q", got, want)
-	}
-}
-
-func TestJWTFetch_BadResponseType(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
-		w.Write([]byte(`{"access_token":123, "token_type": "Bearer"}`))
-	}))
-	defer ts.Close()
-
-	conf := &Config{
-		BaseURL: "https://my.app.com",
-		Subject: "userkey",
-		Config: oauth2.Config{
-			ClientID:     "super_secret_client_id",
-			ClientSecret: "super_shared_secret",
-			Endpoint: oauth2.Endpoint{
-				AuthURL:  "https://example.com",
-				TokenURL: ts.URL,
-			},
-		},
-	}
-
-	tok, err := conf.TokenSource(context.Background()).Token()
-	if err == nil {
-		t.Error("got a token; expected error")
-		if got, want := tok.AccessToken, ""; got != want {
-			t.Errorf("access token = %q; want %q", got, want)
-		}
-	}
-}
-
-func TestJWTFetch_Assertion(t *testing.T) {
-	var assertion string
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		r.ParseForm()
-		assertion = r.Form.Get("assertion")
-
-		w.Header().Set("Content-Type", "application/json")
-		w.Write([]byte(`{
-			"access_token": "90d64460d14870c08c81352a05dedd3465940a7c",
-			"token_type": "Bearer",
-			"expires_in": 3600
-		}`))
-	}))
-	defer ts.Close()
-
-	conf := &Config{
-		BaseURL: "https://my.app.com",
-		Subject: "userkey",
-		Config: oauth2.Config{
-			ClientID:     "super_secret_client_id",
-			ClientSecret: "super_shared_secret",
-			Endpoint: oauth2.Endpoint{
-				AuthURL:  "https://example.com",
-				TokenURL: ts.URL,
-			},
-		},
-	}
-
-	_, err := conf.TokenSource(context.Background()).Token()
-	if err != nil {
-		t.Fatalf("Failed to fetch token: %v", err)
-	}
-
-	parts := strings.Split(assertion, ".")
-	if len(parts) != 3 {
-		t.Fatalf("assertion = %q; want 3 parts", assertion)
-	}
-	gotjson, err := base64.RawURLEncoding.DecodeString(parts[0])
-	if err != nil {
-		t.Fatalf("invalid token header; err = %v", err)
-	}
-
-	got := jws.Header{}
-	if err := json.Unmarshal(gotjson, &got); err != nil {
-		t.Errorf("failed to unmarshal json token header = %q; err = %v", gotjson, err)
-	}
-
-	want := jws.Header{
-		Algorithm: "HS256",
-		Typ:       "JWT",
-	}
-	if got != want {
-		t.Errorf("access token header = %q; want %q", got, want)
-	}
-}
diff --git a/vendor/golang.org/x/oauth2/jws/jws.go b/vendor/golang.org/x/oauth2/jws/jws.go
deleted file mode 100644
index 683d2d2..0000000
--- a/vendor/golang.org/x/oauth2/jws/jws.go
+++ /dev/null
@@ -1,182 +0,0 @@
-// Copyright 2014 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package jws provides a partial implementation
-// of JSON Web Signature encoding and decoding.
-// It exists to support the golang.org/x/oauth2 package.
-//
-// See RFC 7515.
-//
-// Deprecated: this package is not intended for public use and might be
-// removed in the future. It exists for internal use only.
-// Please switch to another JWS package or copy this package into your own
-// source tree.
-package jws // import "golang.org/x/oauth2/jws"
-
-import (
-	"bytes"
-	"crypto"
-	"crypto/rand"
-	"crypto/rsa"
-	"crypto/sha256"
-	"encoding/base64"
-	"encoding/json"
-	"errors"
-	"fmt"
-	"strings"
-	"time"
-)
-
-// ClaimSet contains information about the JWT signature including the
-// permissions being requested (scopes), the target of the token, the issuer,
-// the time the token was issued, and the lifetime of the token.
-type ClaimSet struct {
-	Iss   string `json:"iss"`             // email address of the client_id of the application making the access token request
-	Scope string `json:"scope,omitempty"` // space-delimited list of the permissions the application requests
-	Aud   string `json:"aud"`             // descriptor of the intended target of the assertion (Optional).
-	Exp   int64  `json:"exp"`             // the expiration time of the assertion (seconds since Unix epoch)
-	Iat   int64  `json:"iat"`             // the time the assertion was issued (seconds since Unix epoch)
-	Typ   string `json:"typ,omitempty"`   // token type (Optional).
-
-	// Email for which the application is requesting delegated access (Optional).
-	Sub string `json:"sub,omitempty"`
-
-	// The old name of Sub. Client keeps setting Prn to be
-	// complaint with legacy OAuth 2.0 providers. (Optional)
-	Prn string `json:"prn,omitempty"`
-
-	// See http://tools.ietf.org/html/draft-jones-json-web-token-10#section-4.3
-	// This array is marshalled using custom code (see (c *ClaimSet) encode()).
-	PrivateClaims map[string]interface{} `json:"-"`
-}
-
-func (c *ClaimSet) encode() (string, error) {
-	// Reverting time back for machines whose time is not perfectly in sync.
-	// If client machine's time is in the future according
-	// to Google servers, an access token will not be issued.
-	now := time.Now().Add(-10 * time.Second)
-	if c.Iat == 0 {
-		c.Iat = now.Unix()
-	}
-	if c.Exp == 0 {
-		c.Exp = now.Add(time.Hour).Unix()
-	}
-	if c.Exp < c.Iat {
-		return "", fmt.Errorf("jws: invalid Exp = %v; must be later than Iat = %v", c.Exp, c.Iat)
-	}
-
-	b, err := json.Marshal(c)
-	if err != nil {
-		return "", err
-	}
-
-	if len(c.PrivateClaims) == 0 {
-		return base64.RawURLEncoding.EncodeToString(b), nil
-	}
-
-	// Marshal private claim set and then append it to b.
-	prv, err := json.Marshal(c.PrivateClaims)
-	if err != nil {
-		return "", fmt.Errorf("jws: invalid map of private claims %v", c.PrivateClaims)
-	}
-
-	// Concatenate public and private claim JSON objects.
-	if !bytes.HasSuffix(b, []byte{'}'}) {
-		return "", fmt.Errorf("jws: invalid JSON %s", b)
-	}
-	if !bytes.HasPrefix(prv, []byte{'{'}) {
-		return "", fmt.Errorf("jws: invalid JSON %s", prv)
-	}
-	b[len(b)-1] = ','         // Replace closing curly brace with a comma.
-	b = append(b, prv[1:]...) // Append private claims.
-	return base64.RawURLEncoding.EncodeToString(b), nil
-}
-
-// Header represents the header for the signed JWS payloads.
-type Header struct {
-	// The algorithm used for signature.
-	Algorithm string `json:"alg"`
-
-	// Represents the token type.
-	Typ string `json:"typ"`
-
-	// The optional hint of which key is being used.
-	KeyID string `json:"kid,omitempty"`
-}
-
-func (h *Header) encode() (string, error) {
-	b, err := json.Marshal(h)
-	if err != nil {
-		return "", err
-	}
-	return base64.RawURLEncoding.EncodeToString(b), nil
-}
-
-// Decode decodes a claim set from a JWS payload.
-func Decode(payload string) (*ClaimSet, error) {
-	// decode returned id token to get expiry
-	s := strings.Split(payload, ".")
-	if len(s) < 2 {
-		// TODO(jbd): Provide more context about the error.
-		return nil, errors.New("jws: invalid token received")
-	}
-	decoded, err := base64.RawURLEncoding.DecodeString(s[1])
-	if err != nil {
-		return nil, err
-	}
-	c := &ClaimSet{}
-	err = json.NewDecoder(bytes.NewBuffer(decoded)).Decode(c)
-	return c, err
-}
-
-// Signer returns a signature for the given data.
-type Signer func(data []byte) (sig []byte, err error)
-
-// EncodeWithSigner encodes a header and claim set with the provided signer.
-func EncodeWithSigner(header *Header, c *ClaimSet, sg Signer) (string, error) {
-	head, err := header.encode()
-	if err != nil {
-		return "", err
-	}
-	cs, err := c.encode()
-	if err != nil {
-		return "", err
-	}
-	ss := fmt.Sprintf("%s.%s", head, cs)
-	sig, err := sg([]byte(ss))
-	if err != nil {
-		return "", err
-	}
-	return fmt.Sprintf("%s.%s", ss, base64.RawURLEncoding.EncodeToString(sig)), nil
-}
-
-// Encode encodes a signed JWS with provided header and claim set.
-// This invokes EncodeWithSigner using crypto/rsa.SignPKCS1v15 with the given RSA private key.
-func Encode(header *Header, c *ClaimSet, key *rsa.PrivateKey) (string, error) {
-	sg := func(data []byte) (sig []byte, err error) {
-		h := sha256.New()
-		h.Write(data)
-		return rsa.SignPKCS1v15(rand.Reader, key, crypto.SHA256, h.Sum(nil))
-	}
-	return EncodeWithSigner(header, c, sg)
-}
-
-// Verify tests whether the provided JWT token's signature was produced by the private key
-// associated with the supplied public key.
-func Verify(token string, key *rsa.PublicKey) error {
-	parts := strings.Split(token, ".")
-	if len(parts) != 3 {
-		return errors.New("jws: invalid token received, token must have 3 parts")
-	}
-
-	signedContent := parts[0] + "." + parts[1]
-	signatureString, err := base64.RawURLEncoding.DecodeString(parts[2])
-	if err != nil {
-		return err
-	}
-
-	h := sha256.New()
-	h.Write([]byte(signedContent))
-	return rsa.VerifyPKCS1v15(key, crypto.SHA256, h.Sum(nil), []byte(signatureString))
-}
diff --git a/vendor/golang.org/x/oauth2/jws/jws_test.go b/vendor/golang.org/x/oauth2/jws/jws_test.go
deleted file mode 100644
index 39a136a..0000000
--- a/vendor/golang.org/x/oauth2/jws/jws_test.go
+++ /dev/null
@@ -1,46 +0,0 @@
-// Copyright 2016 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package jws
-
-import (
-	"crypto/rand"
-	"crypto/rsa"
-	"testing"
-)
-
-func TestSignAndVerify(t *testing.T) {
-	header := &Header{
-		Algorithm: "RS256",
-		Typ:       "JWT",
-	}
-	payload := &ClaimSet{
-		Iss: "http://google.com/",
-		Aud: "",
-		Exp: 3610,
-		Iat: 10,
-	}
-
-	privateKey, err := rsa.GenerateKey(rand.Reader, 2048)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	token, err := Encode(header, payload, privateKey)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	err = Verify(token, &privateKey.PublicKey)
-	if err != nil {
-		t.Fatal(err)
-	}
-}
-
-func TestVerifyFailsOnMalformedClaim(t *testing.T) {
-	err := Verify("abc.def", nil)
-	if err == nil {
-		t.Error("got no errors; want improperly formed JWT not to be verified")
-	}
-}
diff --git a/vendor/golang.org/x/oauth2/jwt/example_test.go b/vendor/golang.org/x/oauth2/jwt/example_test.go
deleted file mode 100644
index 58503d8..0000000
--- a/vendor/golang.org/x/oauth2/jwt/example_test.go
+++ /dev/null
@@ -1,33 +0,0 @@
-// Copyright 2014 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package jwt_test
-
-import (
-	"context"
-
-	"golang.org/x/oauth2/jwt"
-)
-
-func ExampleJWTConfig() {
-	ctx := context.Background()
-	conf := &jwt.Config{
-		Email: "xxx@developer.com",
-		// The contents of your RSA private key or your PEM file
-		// that contains a private key.
-		// If you have a p12 file instead, you
-		// can use `openssl` to export the private key into a pem file.
-		//
-		//    $ openssl pkcs12 -in key.p12 -out key.pem -nodes
-		//
-		// It only supports PEM containers with no passphrase.
-		PrivateKey: []byte("-----BEGIN RSA PRIVATE KEY-----..."),
-		Subject:    "user@example.com",
-		TokenURL:   "https://provider.com/o/oauth2/token",
-	}
-	// Initiate an http.Client, the following GET request will be
-	// authorized and authenticated on the behalf of user@example.com.
-	client := conf.Client(ctx)
-	client.Get("...")
-}
diff --git a/vendor/golang.org/x/oauth2/jwt/jwt.go b/vendor/golang.org/x/oauth2/jwt/jwt.go
deleted file mode 100644
index e08f315..0000000
--- a/vendor/golang.org/x/oauth2/jwt/jwt.go
+++ /dev/null
@@ -1,162 +0,0 @@
-// Copyright 2014 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package jwt implements the OAuth 2.0 JSON Web Token flow, commonly
-// known as "two-legged OAuth 2.0".
-//
-// See: https://tools.ietf.org/html/draft-ietf-oauth-jwt-bearer-12
-package jwt
-
-import (
-	"encoding/json"
-	"fmt"
-	"io"
-	"io/ioutil"
-	"net/http"
-	"net/url"
-	"strings"
-	"time"
-
-	"golang.org/x/net/context"
-	"golang.org/x/oauth2"
-	"golang.org/x/oauth2/internal"
-	"golang.org/x/oauth2/jws"
-)
-
-var (
-	defaultGrantType = "urn:ietf:params:oauth:grant-type:jwt-bearer"
-	defaultHeader    = &jws.Header{Algorithm: "RS256", Typ: "JWT"}
-)
-
-// Config is the configuration for using JWT to fetch tokens,
-// commonly known as "two-legged OAuth 2.0".
-type Config struct {
-	// Email is the OAuth client identifier used when communicating with
-	// the configured OAuth provider.
-	Email string
-
-	// PrivateKey contains the contents of an RSA private key or the
-	// contents of a PEM file that contains a private key. The provided
-	// private key is used to sign JWT payloads.
-	// PEM containers with a passphrase are not supported.
-	// Use the following command to convert a PKCS 12 file into a PEM.
-	//
-	//    $ openssl pkcs12 -in key.p12 -out key.pem -nodes
-	//
-	PrivateKey []byte
-
-	// PrivateKeyID contains an optional hint indicating which key is being
-	// used.
-	PrivateKeyID string
-
-	// Subject is the optional user to impersonate.
-	Subject string
-
-	// Scopes optionally specifies a list of requested permission scopes.
-	Scopes []string
-
-	// TokenURL is the endpoint required to complete the 2-legged JWT flow.
-	TokenURL string
-
-	// Expires optionally specifies how long the token is valid for.
-	Expires time.Duration
-}
-
-// TokenSource returns a JWT TokenSource using the configuration
-// in c and the HTTP client from the provided context.
-func (c *Config) TokenSource(ctx context.Context) oauth2.TokenSource {
-	return oauth2.ReuseTokenSource(nil, jwtSource{ctx, c})
-}
-
-// Client returns an HTTP client wrapping the context's
-// HTTP transport and adding Authorization headers with tokens
-// obtained from c.
-//
-// The returned client and its Transport should not be modified.
-func (c *Config) Client(ctx context.Context) *http.Client {
-	return oauth2.NewClient(ctx, c.TokenSource(ctx))
-}
-
-// jwtSource is a source that always does a signed JWT request for a token.
-// It should typically be wrapped with a reuseTokenSource.
-type jwtSource struct {
-	ctx  context.Context
-	conf *Config
-}
-
-func (js jwtSource) Token() (*oauth2.Token, error) {
-	pk, err := internal.ParseKey(js.conf.PrivateKey)
-	if err != nil {
-		return nil, err
-	}
-	hc := oauth2.NewClient(js.ctx, nil)
-	claimSet := &jws.ClaimSet{
-		Iss:   js.conf.Email,
-		Scope: strings.Join(js.conf.Scopes, " "),
-		Aud:   js.conf.TokenURL,
-	}
-	if subject := js.conf.Subject; subject != "" {
-		claimSet.Sub = subject
-		// prn is the old name of sub. Keep setting it
-		// to be compatible with legacy OAuth 2.0 providers.
-		claimSet.Prn = subject
-	}
-	if t := js.conf.Expires; t > 0 {
-		claimSet.Exp = time.Now().Add(t).Unix()
-	}
-	h := *defaultHeader
-	h.KeyID = js.conf.PrivateKeyID
-	payload, err := jws.Encode(&h, claimSet, pk)
-	if err != nil {
-		return nil, err
-	}
-	v := url.Values{}
-	v.Set("grant_type", defaultGrantType)
-	v.Set("assertion", payload)
-	resp, err := hc.PostForm(js.conf.TokenURL, v)
-	if err != nil {
-		return nil, fmt.Errorf("oauth2: cannot fetch token: %v", err)
-	}
-	defer resp.Body.Close()
-	body, err := ioutil.ReadAll(io.LimitReader(resp.Body, 1<<20))
-	if err != nil {
-		return nil, fmt.Errorf("oauth2: cannot fetch token: %v", err)
-	}
-	if c := resp.StatusCode; c < 200 || c > 299 {
-		return nil, &oauth2.RetrieveError{
-			Response: resp,
-			Body:     body,
-		}
-	}
-	// tokenRes is the JSON response body.
-	var tokenRes struct {
-		AccessToken string `json:"access_token"`
-		TokenType   string `json:"token_type"`
-		IDToken     string `json:"id_token"`
-		ExpiresIn   int64  `json:"expires_in"` // relative seconds from now
-	}
-	if err := json.Unmarshal(body, &tokenRes); err != nil {
-		return nil, fmt.Errorf("oauth2: cannot fetch token: %v", err)
-	}
-	token := &oauth2.Token{
-		AccessToken: tokenRes.AccessToken,
-		TokenType:   tokenRes.TokenType,
-	}
-	raw := make(map[string]interface{})
-	json.Unmarshal(body, &raw) // no error checks for optional fields
-	token = token.WithExtra(raw)
-
-	if secs := tokenRes.ExpiresIn; secs > 0 {
-		token.Expiry = time.Now().Add(time.Duration(secs) * time.Second)
-	}
-	if v := tokenRes.IDToken; v != "" {
-		// decode returned id token to get expiry
-		claimSet, err := jws.Decode(v)
-		if err != nil {
-			return nil, fmt.Errorf("oauth2: error decoding JWT token: %v", err)
-		}
-		token.Expiry = time.Unix(claimSet.Exp, 0)
-	}
-	return token, nil
-}
diff --git a/vendor/golang.org/x/oauth2/jwt/jwt_test.go b/vendor/golang.org/x/oauth2/jwt/jwt_test.go
deleted file mode 100644
index 1fbb9aa..0000000
--- a/vendor/golang.org/x/oauth2/jwt/jwt_test.go
+++ /dev/null
@@ -1,221 +0,0 @@
-// Copyright 2014 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package jwt
-
-import (
-	"context"
-	"encoding/base64"
-	"encoding/json"
-	"fmt"
-	"net/http"
-	"net/http/httptest"
-	"strings"
-	"testing"
-
-	"golang.org/x/oauth2"
-	"golang.org/x/oauth2/jws"
-)
-
-var dummyPrivateKey = []byte(`-----BEGIN RSA PRIVATE KEY-----
-MIIEpAIBAAKCAQEAx4fm7dngEmOULNmAs1IGZ9Apfzh+BkaQ1dzkmbUgpcoghucE
-DZRnAGd2aPyB6skGMXUytWQvNYav0WTR00wFtX1ohWTfv68HGXJ8QXCpyoSKSSFY
-fuP9X36wBSkSX9J5DVgiuzD5VBdzUISSmapjKm+DcbRALjz6OUIPEWi1Tjl6p5RK
-1w41qdbmt7E5/kGhKLDuT7+M83g4VWhgIvaAXtnhklDAggilPPa8ZJ1IFe31lNlr
-k4DRk38nc6sEutdf3RL7QoH7FBusI7uXV03DC6dwN1kP4GE7bjJhcRb/7jYt7CQ9
-/E9Exz3c0yAp0yrTg0Fwh+qxfH9dKwN52S7SBwIDAQABAoIBAQCaCs26K07WY5Jt
-3a2Cw3y2gPrIgTCqX6hJs7O5ByEhXZ8nBwsWANBUe4vrGaajQHdLj5OKfsIDrOvn
-2NI1MqflqeAbu/kR32q3tq8/Rl+PPiwUsW3E6Pcf1orGMSNCXxeducF2iySySzh3
-nSIhCG5uwJDWI7a4+9KiieFgK1pt/Iv30q1SQS8IEntTfXYwANQrfKUVMmVF9aIK
-6/WZE2yd5+q3wVVIJ6jsmTzoDCX6QQkkJICIYwCkglmVy5AeTckOVwcXL0jqw5Kf
-5/soZJQwLEyBoQq7Kbpa26QHq+CJONetPP8Ssy8MJJXBT+u/bSseMb3Zsr5cr43e
-DJOhwsThAoGBAPY6rPKl2NT/K7XfRCGm1sbWjUQyDShscwuWJ5+kD0yudnT/ZEJ1
-M3+KS/iOOAoHDdEDi9crRvMl0UfNa8MAcDKHflzxg2jg/QI+fTBjPP5GOX0lkZ9g
-z6VePoVoQw2gpPFVNPPTxKfk27tEzbaffvOLGBEih0Kb7HTINkW8rIlzAoGBAM9y
-1yr+jvfS1cGFtNU+Gotoihw2eMKtIqR03Yn3n0PK1nVCDKqwdUqCypz4+ml6cxRK
-J8+Pfdh7D+ZJd4LEG6Y4QRDLuv5OA700tUoSHxMSNn3q9As4+T3MUyYxWKvTeu3U
-f2NWP9ePU0lV8ttk7YlpVRaPQmc1qwooBA/z/8AdAoGAW9x0HWqmRICWTBnpjyxx
-QGlW9rQ9mHEtUotIaRSJ6K/F3cxSGUEkX1a3FRnp6kPLcckC6NlqdNgNBd6rb2rA
-cPl/uSkZP42Als+9YMoFPU/xrrDPbUhu72EDrj3Bllnyb168jKLa4VBOccUvggxr
-Dm08I1hgYgdN5huzs7y6GeUCgYEAj+AZJSOJ6o1aXS6rfV3mMRve9bQ9yt8jcKXw
-5HhOCEmMtaSKfnOF1Ziih34Sxsb7O2428DiX0mV/YHtBnPsAJidL0SdLWIapBzeg
-KHArByIRkwE6IvJvwpGMdaex1PIGhx5i/3VZL9qiq/ElT05PhIb+UXgoWMabCp84
-OgxDK20CgYAeaFo8BdQ7FmVX2+EEejF+8xSge6WVLtkaon8bqcn6P0O8lLypoOhd
-mJAYH8WU+UAy9pecUnDZj14LAGNVmYcse8HFX71MoshnvCTFEPVo4rZxIAGwMpeJ
-5jgQ3slYLpqrGlcbLgUXBUgzEO684Wk/UV9DFPlHALVqCfXQ9dpJPg==
------END RSA PRIVATE KEY-----`)
-
-func TestJWTFetch_JSONResponse(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
-		w.Write([]byte(`{
-			"access_token": "90d64460d14870c08c81352a05dedd3465940a7c",
-			"scope": "user",
-			"token_type": "bearer",
-			"expires_in": 3600
-		}`))
-	}))
-	defer ts.Close()
-
-	conf := &Config{
-		Email:      "aaa@xxx.com",
-		PrivateKey: dummyPrivateKey,
-		TokenURL:   ts.URL,
-	}
-	tok, err := conf.TokenSource(context.Background()).Token()
-	if err != nil {
-		t.Fatal(err)
-	}
-	if !tok.Valid() {
-		t.Errorf("got invalid token: %v", tok)
-	}
-	if got, want := tok.AccessToken, "90d64460d14870c08c81352a05dedd3465940a7c"; got != want {
-		t.Errorf("access token = %q; want %q", got, want)
-	}
-	if got, want := tok.TokenType, "bearer"; got != want {
-		t.Errorf("token type = %q; want %q", got, want)
-	}
-	if got := tok.Expiry.IsZero(); got {
-		t.Errorf("token expiry = %v, want none", got)
-	}
-	scope := tok.Extra("scope")
-	if got, want := scope, "user"; got != want {
-		t.Errorf("scope = %q; want %q", got, want)
-	}
-}
-
-func TestJWTFetch_BadResponse(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
-		w.Write([]byte(`{"scope": "user", "token_type": "bearer"}`))
-	}))
-	defer ts.Close()
-
-	conf := &Config{
-		Email:      "aaa@xxx.com",
-		PrivateKey: dummyPrivateKey,
-		TokenURL:   ts.URL,
-	}
-	tok, err := conf.TokenSource(context.Background()).Token()
-	if err != nil {
-		t.Fatal(err)
-	}
-	if tok == nil {
-		t.Fatalf("got nil token; want token")
-	}
-	if tok.Valid() {
-		t.Errorf("got invalid token: %v", tok)
-	}
-	if got, want := tok.AccessToken, ""; got != want {
-		t.Errorf("access token = %q; want %q", got, want)
-	}
-	if got, want := tok.TokenType, "bearer"; got != want {
-		t.Errorf("token type = %q; want %q", got, want)
-	}
-	scope := tok.Extra("scope")
-	if got, want := scope, "user"; got != want {
-		t.Errorf("token scope = %q; want %q", got, want)
-	}
-}
-
-func TestJWTFetch_BadResponseType(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
-		w.Write([]byte(`{"access_token":123, "scope": "user", "token_type": "bearer"}`))
-	}))
-	defer ts.Close()
-	conf := &Config{
-		Email:      "aaa@xxx.com",
-		PrivateKey: dummyPrivateKey,
-		TokenURL:   ts.URL,
-	}
-	tok, err := conf.TokenSource(context.Background()).Token()
-	if err == nil {
-		t.Error("got a token; expected error")
-		if got, want := tok.AccessToken, ""; got != want {
-			t.Errorf("access token = %q; want %q", got, want)
-		}
-	}
-}
-
-func TestJWTFetch_Assertion(t *testing.T) {
-	var assertion string
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		r.ParseForm()
-		assertion = r.Form.Get("assertion")
-
-		w.Header().Set("Content-Type", "application/json")
-		w.Write([]byte(`{
-			"access_token": "90d64460d14870c08c81352a05dedd3465940a7c",
-			"scope": "user",
-			"token_type": "bearer",
-			"expires_in": 3600
-		}`))
-	}))
-	defer ts.Close()
-
-	conf := &Config{
-		Email:        "aaa@xxx.com",
-		PrivateKey:   dummyPrivateKey,
-		PrivateKeyID: "ABCDEFGHIJKLMNOPQRSTUVWXYZ",
-		TokenURL:     ts.URL,
-	}
-
-	_, err := conf.TokenSource(context.Background()).Token()
-	if err != nil {
-		t.Fatalf("Failed to fetch token: %v", err)
-	}
-
-	parts := strings.Split(assertion, ".")
-	if len(parts) != 3 {
-		t.Fatalf("assertion = %q; want 3 parts", assertion)
-	}
-	gotjson, err := base64.RawURLEncoding.DecodeString(parts[0])
-	if err != nil {
-		t.Fatalf("invalid token header; err = %v", err)
-	}
-
-	got := jws.Header{}
-	if err := json.Unmarshal(gotjson, &got); err != nil {
-		t.Errorf("failed to unmarshal json token header = %q; err = %v", gotjson, err)
-	}
-
-	want := jws.Header{
-		Algorithm: "RS256",
-		Typ:       "JWT",
-		KeyID:     "ABCDEFGHIJKLMNOPQRSTUVWXYZ",
-	}
-	if got != want {
-		t.Errorf("access token header = %q; want %q", got, want)
-	}
-}
-
-func TestTokenRetrieveError(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-type", "application/json")
-		w.WriteHeader(http.StatusBadRequest)
-		w.Write([]byte(`{"error": "invalid_grant"}`))
-	}))
-	defer ts.Close()
-
-	conf := &Config{
-		Email:      "aaa@xxx.com",
-		PrivateKey: dummyPrivateKey,
-		TokenURL:   ts.URL,
-	}
-
-	_, err := conf.TokenSource(context.Background()).Token()
-	if err == nil {
-		t.Fatalf("got no error, expected one")
-	}
-	_, ok := err.(*oauth2.RetrieveError)
-	if !ok {
-		t.Fatalf("got %T error, expected *RetrieveError", err)
-	}
-	// Test error string for backwards compatibility
-	expected := fmt.Sprintf("oauth2: cannot fetch token: %v\nResponse: %s", "400 Bad Request", `{"error": "invalid_grant"}`)
-	if errStr := err.Error(); errStr != expected {
-		t.Fatalf("got %#v, expected %#v", errStr, expected)
-	}
-}
diff --git a/vendor/golang.org/x/oauth2/kakao/kakao.go b/vendor/golang.org/x/oauth2/kakao/kakao.go
deleted file mode 100644
index 6d21126..0000000
--- a/vendor/golang.org/x/oauth2/kakao/kakao.go
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2018 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package kakao provides constants for using OAuth2 to access Kakao.
-package kakao // import "golang.org/x/oauth2/kakao"
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is Kakao's OAuth 2.0 endpoint.
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://kauth.kakao.com/oauth/authorize",
-	TokenURL: "https://kauth.kakao.com/oauth/token",
-}
diff --git a/vendor/golang.org/x/oauth2/linkedin/linkedin.go b/vendor/golang.org/x/oauth2/linkedin/linkedin.go
deleted file mode 100644
index 62d1de8..0000000
--- a/vendor/golang.org/x/oauth2/linkedin/linkedin.go
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package linkedin provides constants for using OAuth2 to access LinkedIn.
-package linkedin // import "golang.org/x/oauth2/linkedin"
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is LinkedIn's OAuth 2.0 endpoint.
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://www.linkedin.com/oauth/v2/authorization",
-	TokenURL: "https://www.linkedin.com/oauth/v2/accessToken",
-}
diff --git a/vendor/golang.org/x/oauth2/mailchimp/mailchimp.go b/vendor/golang.org/x/oauth2/mailchimp/mailchimp.go
deleted file mode 100644
index 647787e..0000000
--- a/vendor/golang.org/x/oauth2/mailchimp/mailchimp.go
+++ /dev/null
@@ -1,17 +0,0 @@
-// Copyright 2018 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package mailchimp provides constants for using OAuth2 to access MailChimp.
-package mailchimp // import "golang.org/x/oauth2/mailchimp"
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is MailChimp's OAuth 2.0 endpoint.
-// See http://developer.mailchimp.com/documentation/mailchimp/guides/how-to-use-oauth2/
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://login.mailchimp.com/oauth2/authorize",
-	TokenURL: "https://login.mailchimp.com/oauth2/token",
-}
diff --git a/vendor/golang.org/x/oauth2/mailru/mailru.go b/vendor/golang.org/x/oauth2/mailru/mailru.go
deleted file mode 100644
index dddd9dd..0000000
--- a/vendor/golang.org/x/oauth2/mailru/mailru.go
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2017 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package mailru provides constants for using OAuth2 to access Mail.Ru.
-package mailru // import "golang.org/x/oauth2/mailru"
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is Mail.Ru's OAuth 2.0 endpoint.
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://o2.mail.ru/login",
-	TokenURL: "https://o2.mail.ru/token",
-}
diff --git a/vendor/golang.org/x/oauth2/mediamath/mediamath.go b/vendor/golang.org/x/oauth2/mediamath/mediamath.go
deleted file mode 100644
index 3ebce5d..0000000
--- a/vendor/golang.org/x/oauth2/mediamath/mediamath.go
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright 2016 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package mediamath provides constants for using OAuth2 to access MediaMath.
-package mediamath // import "golang.org/x/oauth2/mediamath"
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is MediaMath's OAuth 2.0 endpoint for production.
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://api.mediamath.com/oauth2/v1.0/authorize",
-	TokenURL: "https://api.mediamath.com/oauth2/v1.0/token",
-}
-
-// SandboxEndpoint is MediaMath's OAuth 2.0 endpoint for sandbox.
-var SandboxEndpoint = oauth2.Endpoint{
-	AuthURL:  "https://t1sandbox.mediamath.com/oauth2/v1.0/authorize",
-	TokenURL: "https://t1sandbox.mediamath.com/oauth2/v1.0/token",
-}
diff --git a/vendor/golang.org/x/oauth2/microsoft/microsoft.go b/vendor/golang.org/x/oauth2/microsoft/microsoft.go
deleted file mode 100644
index 3ffbc57..0000000
--- a/vendor/golang.org/x/oauth2/microsoft/microsoft.go
+++ /dev/null
@@ -1,31 +0,0 @@
-// Copyright 2016 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package microsoft provides constants for using OAuth2 to access Windows Live ID.
-package microsoft // import "golang.org/x/oauth2/microsoft"
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// LiveConnectEndpoint is Windows's Live ID OAuth 2.0 endpoint.
-var LiveConnectEndpoint = oauth2.Endpoint{
-	AuthURL:  "https://login.live.com/oauth20_authorize.srf",
-	TokenURL: "https://login.live.com/oauth20_token.srf",
-}
-
-// AzureADEndpoint returns a new oauth2.Endpoint for the given tenant at Azure Active Directory.
-// If tenant is empty, it uses the tenant called `common`.
-//
-// For more information see:
-// https://docs.microsoft.com/en-us/azure/active-directory/develop/active-directory-v2-protocols#endpoints
-func AzureADEndpoint(tenant string) oauth2.Endpoint {
-	if tenant == "" {
-		tenant = "common"
-	}
-	return oauth2.Endpoint{
-		AuthURL:  "https://login.microsoftonline.com/" + tenant + "/oauth2/v2.0/authorize",
-		TokenURL: "https://login.microsoftonline.com/" + tenant + "/oauth2/v2.0/token",
-	}
-}
diff --git a/vendor/golang.org/x/oauth2/oauth2_test.go b/vendor/golang.org/x/oauth2/oauth2_test.go
deleted file mode 100644
index ef12ebc..0000000
--- a/vendor/golang.org/x/oauth2/oauth2_test.go
+++ /dev/null
@@ -1,551 +0,0 @@
-// Copyright 2014 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package oauth2
-
-import (
-	"errors"
-	"fmt"
-	"io/ioutil"
-	"net/http"
-	"net/http/httptest"
-	"net/url"
-	"testing"
-	"time"
-
-	"golang.org/x/net/context"
-)
-
-type mockTransport struct {
-	rt func(req *http.Request) (resp *http.Response, err error)
-}
-
-func (t *mockTransport) RoundTrip(req *http.Request) (resp *http.Response, err error) {
-	return t.rt(req)
-}
-
-func newConf(url string) *Config {
-	return &Config{
-		ClientID:     "CLIENT_ID",
-		ClientSecret: "CLIENT_SECRET",
-		RedirectURL:  "REDIRECT_URL",
-		Scopes:       []string{"scope1", "scope2"},
-		Endpoint: Endpoint{
-			AuthURL:  url + "/auth",
-			TokenURL: url + "/token",
-		},
-	}
-}
-
-func TestAuthCodeURL(t *testing.T) {
-	conf := newConf("server")
-	url := conf.AuthCodeURL("foo", AccessTypeOffline, ApprovalForce)
-	const want = "server/auth?access_type=offline&approval_prompt=force&client_id=CLIENT_ID&redirect_uri=REDIRECT_URL&response_type=code&scope=scope1+scope2&state=foo"
-	if got := url; got != want {
-		t.Errorf("got auth code URL = %q; want %q", got, want)
-	}
-}
-
-func TestAuthCodeURL_CustomParam(t *testing.T) {
-	conf := newConf("server")
-	param := SetAuthURLParam("foo", "bar")
-	url := conf.AuthCodeURL("baz", param)
-	const want = "server/auth?client_id=CLIENT_ID&foo=bar&redirect_uri=REDIRECT_URL&response_type=code&scope=scope1+scope2&state=baz"
-	if got := url; got != want {
-		t.Errorf("got auth code = %q; want %q", got, want)
-	}
-}
-
-func TestAuthCodeURL_Optional(t *testing.T) {
-	conf := &Config{
-		ClientID: "CLIENT_ID",
-		Endpoint: Endpoint{
-			AuthURL:  "/auth-url",
-			TokenURL: "/token-url",
-		},
-	}
-	url := conf.AuthCodeURL("")
-	const want = "/auth-url?client_id=CLIENT_ID&response_type=code"
-	if got := url; got != want {
-		t.Fatalf("got auth code = %q; want %q", got, want)
-	}
-}
-
-func TestURLUnsafeClientConfig(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if got, want := r.Header.Get("Authorization"), "Basic Q0xJRU5UX0lEJTNGJTNGOkNMSUVOVF9TRUNSRVQlM0YlM0Y="; got != want {
-			t.Errorf("Authorization header = %q; want %q", got, want)
-		}
-
-		w.Header().Set("Content-Type", "application/x-www-form-urlencoded")
-		w.Write([]byte("access_token=90d64460d14870c08c81352a05dedd3465940a7c&scope=user&token_type=bearer"))
-	}))
-	defer ts.Close()
-	conf := newConf(ts.URL)
-	conf.ClientID = "CLIENT_ID??"
-	conf.ClientSecret = "CLIENT_SECRET??"
-	_, err := conf.Exchange(context.Background(), "exchange-code")
-	if err != nil {
-		t.Error(err)
-	}
-}
-
-func TestExchangeRequest(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.String() != "/token" {
-			t.Errorf("Unexpected exchange request URL, %v is found.", r.URL)
-		}
-		headerAuth := r.Header.Get("Authorization")
-		if headerAuth != "Basic Q0xJRU5UX0lEOkNMSUVOVF9TRUNSRVQ=" {
-			t.Errorf("Unexpected authorization header, %v is found.", headerAuth)
-		}
-		headerContentType := r.Header.Get("Content-Type")
-		if headerContentType != "application/x-www-form-urlencoded" {
-			t.Errorf("Unexpected Content-Type header, %v is found.", headerContentType)
-		}
-		body, err := ioutil.ReadAll(r.Body)
-		if err != nil {
-			t.Errorf("Failed reading request body: %s.", err)
-		}
-		if string(body) != "code=exchange-code&grant_type=authorization_code&redirect_uri=REDIRECT_URL" {
-			t.Errorf("Unexpected exchange payload, %v is found.", string(body))
-		}
-		w.Header().Set("Content-Type", "application/x-www-form-urlencoded")
-		w.Write([]byte("access_token=90d64460d14870c08c81352a05dedd3465940a7c&scope=user&token_type=bearer"))
-	}))
-	defer ts.Close()
-	conf := newConf(ts.URL)
-	tok, err := conf.Exchange(context.Background(), "exchange-code")
-	if err != nil {
-		t.Error(err)
-	}
-	if !tok.Valid() {
-		t.Fatalf("Token invalid. Got: %#v", tok)
-	}
-	if tok.AccessToken != "90d64460d14870c08c81352a05dedd3465940a7c" {
-		t.Errorf("Unexpected access token, %#v.", tok.AccessToken)
-	}
-	if tok.TokenType != "bearer" {
-		t.Errorf("Unexpected token type, %#v.", tok.TokenType)
-	}
-	scope := tok.Extra("scope")
-	if scope != "user" {
-		t.Errorf("Unexpected value for scope: %v", scope)
-	}
-}
-
-func TestExchangeRequest_CustomParam(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.String() != "/token" {
-			t.Errorf("Unexpected exchange request URL, %v is found.", r.URL)
-		}
-		headerAuth := r.Header.Get("Authorization")
-		if headerAuth != "Basic Q0xJRU5UX0lEOkNMSUVOVF9TRUNSRVQ=" {
-			t.Errorf("Unexpected authorization header, %v is found.", headerAuth)
-		}
-		headerContentType := r.Header.Get("Content-Type")
-		if headerContentType != "application/x-www-form-urlencoded" {
-			t.Errorf("Unexpected Content-Type header, %v is found.", headerContentType)
-		}
-		body, err := ioutil.ReadAll(r.Body)
-		if err != nil {
-			t.Errorf("Failed reading request body: %s.", err)
-		}
-		if string(body) != "code=exchange-code&foo=bar&grant_type=authorization_code&redirect_uri=REDIRECT_URL" {
-			t.Errorf("Unexpected exchange payload, %v is found.", string(body))
-		}
-		w.Header().Set("Content-Type", "application/x-www-form-urlencoded")
-		w.Write([]byte("access_token=90d64460d14870c08c81352a05dedd3465940a7c&scope=user&token_type=bearer"))
-	}))
-	defer ts.Close()
-	conf := newConf(ts.URL)
-
-	param := SetAuthURLParam("foo", "bar")
-	tok, err := conf.Exchange(context.Background(), "exchange-code", param)
-	if err != nil {
-		t.Error(err)
-	}
-	if !tok.Valid() {
-		t.Fatalf("Token invalid. Got: %#v", tok)
-	}
-	if tok.AccessToken != "90d64460d14870c08c81352a05dedd3465940a7c" {
-		t.Errorf("Unexpected access token, %#v.", tok.AccessToken)
-	}
-	if tok.TokenType != "bearer" {
-		t.Errorf("Unexpected token type, %#v.", tok.TokenType)
-	}
-	scope := tok.Extra("scope")
-	if scope != "user" {
-		t.Errorf("Unexpected value for scope: %v", scope)
-	}
-}
-
-func TestExchangeRequest_JSONResponse(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.String() != "/token" {
-			t.Errorf("Unexpected exchange request URL, %v is found.", r.URL)
-		}
-		headerAuth := r.Header.Get("Authorization")
-		if headerAuth != "Basic Q0xJRU5UX0lEOkNMSUVOVF9TRUNSRVQ=" {
-			t.Errorf("Unexpected authorization header, %v is found.", headerAuth)
-		}
-		headerContentType := r.Header.Get("Content-Type")
-		if headerContentType != "application/x-www-form-urlencoded" {
-			t.Errorf("Unexpected Content-Type header, %v is found.", headerContentType)
-		}
-		body, err := ioutil.ReadAll(r.Body)
-		if err != nil {
-			t.Errorf("Failed reading request body: %s.", err)
-		}
-		if string(body) != "code=exchange-code&grant_type=authorization_code&redirect_uri=REDIRECT_URL" {
-			t.Errorf("Unexpected exchange payload, %v is found.", string(body))
-		}
-		w.Header().Set("Content-Type", "application/json")
-		w.Write([]byte(`{"access_token": "90d64460d14870c08c81352a05dedd3465940a7c", "scope": "user", "token_type": "bearer", "expires_in": 86400}`))
-	}))
-	defer ts.Close()
-	conf := newConf(ts.URL)
-	tok, err := conf.Exchange(context.Background(), "exchange-code")
-	if err != nil {
-		t.Error(err)
-	}
-	if !tok.Valid() {
-		t.Fatalf("Token invalid. Got: %#v", tok)
-	}
-	if tok.AccessToken != "90d64460d14870c08c81352a05dedd3465940a7c" {
-		t.Errorf("Unexpected access token, %#v.", tok.AccessToken)
-	}
-	if tok.TokenType != "bearer" {
-		t.Errorf("Unexpected token type, %#v.", tok.TokenType)
-	}
-	scope := tok.Extra("scope")
-	if scope != "user" {
-		t.Errorf("Unexpected value for scope: %v", scope)
-	}
-	expiresIn := tok.Extra("expires_in")
-	if expiresIn != float64(86400) {
-		t.Errorf("Unexpected non-numeric value for expires_in: %v", expiresIn)
-	}
-}
-
-func TestExtraValueRetrieval(t *testing.T) {
-	values := url.Values{}
-	kvmap := map[string]string{
-		"scope": "user", "token_type": "bearer", "expires_in": "86400.92",
-		"server_time": "1443571905.5606415", "referer_ip": "10.0.0.1",
-		"etag": "\"afZYj912P4alikMz_P11982\"", "request_id": "86400",
-		"untrimmed": "  untrimmed  ",
-	}
-	for key, value := range kvmap {
-		values.Set(key, value)
-	}
-
-	tok := Token{raw: values}
-	scope := tok.Extra("scope")
-	if got, want := scope, "user"; got != want {
-		t.Errorf("got scope = %q; want %q", got, want)
-	}
-	serverTime := tok.Extra("server_time")
-	if got, want := serverTime, 1443571905.5606415; got != want {
-		t.Errorf("got server_time value = %v; want %v", got, want)
-	}
-	refererIP := tok.Extra("referer_ip")
-	if got, want := refererIP, "10.0.0.1"; got != want {
-		t.Errorf("got referer_ip value = %v, want %v", got, want)
-	}
-	expiresIn := tok.Extra("expires_in")
-	if got, want := expiresIn, 86400.92; got != want {
-		t.Errorf("got expires_in value = %v, want %v", got, want)
-	}
-	requestID := tok.Extra("request_id")
-	if got, want := requestID, int64(86400); got != want {
-		t.Errorf("got request_id value = %v, want %v", got, want)
-	}
-	untrimmed := tok.Extra("untrimmed")
-	if got, want := untrimmed, "  untrimmed  "; got != want {
-		t.Errorf("got untrimmed = %q; want %q", got, want)
-	}
-}
-
-const day = 24 * time.Hour
-
-func TestExchangeRequest_JSONResponse_Expiry(t *testing.T) {
-	seconds := int32(day.Seconds())
-	for _, c := range []struct {
-		expires string
-		want    bool
-	}{
-		{fmt.Sprintf(`"expires_in": %d`, seconds), true},
-		{fmt.Sprintf(`"expires_in": "%d"`, seconds), true}, // PayPal case
-		{fmt.Sprintf(`"expires": %d`, seconds), true},      // Facebook case
-		{`"expires": false`, false},                        // wrong type
-		{`"expires": {}`, false},                           // wrong type
-		{`"expires": "zzz"`, false},                        // wrong value
-	} {
-		testExchangeRequest_JSONResponse_expiry(t, c.expires, c.want)
-	}
-}
-
-func testExchangeRequest_JSONResponse_expiry(t *testing.T, exp string, want bool) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
-		w.Write([]byte(fmt.Sprintf(`{"access_token": "90d", "scope": "user", "token_type": "bearer", %s}`, exp)))
-	}))
-	defer ts.Close()
-	conf := newConf(ts.URL)
-	t1 := time.Now().Add(day)
-	tok, err := conf.Exchange(context.Background(), "exchange-code")
-	t2 := time.Now().Add(day)
-
-	if got := (err == nil); got != want {
-		if want {
-			t.Errorf("unexpected error: got %v", err)
-		} else {
-			t.Errorf("unexpected success")
-		}
-	}
-	if !want {
-		return
-	}
-	if !tok.Valid() {
-		t.Fatalf("Token invalid. Got: %#v", tok)
-	}
-	expiry := tok.Expiry
-	if expiry.Before(t1) || expiry.After(t2) {
-		t.Errorf("Unexpected value for Expiry: %v (shold be between %v and %v)", expiry, t1, t2)
-	}
-}
-
-func TestExchangeRequest_BadResponse(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
-		w.Write([]byte(`{"scope": "user", "token_type": "bearer"}`))
-	}))
-	defer ts.Close()
-	conf := newConf(ts.URL)
-	_, err := conf.Exchange(context.Background(), "code")
-	if err == nil {
-		t.Error("expected error from missing access_token")
-	}
-}
-
-func TestExchangeRequest_BadResponseType(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
-		w.Write([]byte(`{"access_token":123,  "scope": "user", "token_type": "bearer"}`))
-	}))
-	defer ts.Close()
-	conf := newConf(ts.URL)
-	_, err := conf.Exchange(context.Background(), "exchange-code")
-	if err == nil {
-		t.Error("expected error from non-string access_token")
-	}
-}
-
-func TestExchangeRequest_NonBasicAuth(t *testing.T) {
-	tr := &mockTransport{
-		rt: func(r *http.Request) (w *http.Response, err error) {
-			headerAuth := r.Header.Get("Authorization")
-			if headerAuth != "" {
-				t.Errorf("Unexpected authorization header, %v is found.", headerAuth)
-			}
-			return nil, errors.New("no response")
-		},
-	}
-	c := &http.Client{Transport: tr}
-	conf := &Config{
-		ClientID: "CLIENT_ID",
-		Endpoint: Endpoint{
-			AuthURL:  "https://accounts.google.com/auth",
-			TokenURL: "https://accounts.google.com/token",
-		},
-	}
-
-	ctx := context.WithValue(context.Background(), HTTPClient, c)
-	conf.Exchange(ctx, "code")
-}
-
-func TestPasswordCredentialsTokenRequest(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		defer r.Body.Close()
-		expected := "/token"
-		if r.URL.String() != expected {
-			t.Errorf("URL = %q; want %q", r.URL, expected)
-		}
-		headerAuth := r.Header.Get("Authorization")
-		expected = "Basic Q0xJRU5UX0lEOkNMSUVOVF9TRUNSRVQ="
-		if headerAuth != expected {
-			t.Errorf("Authorization header = %q; want %q", headerAuth, expected)
-		}
-		headerContentType := r.Header.Get("Content-Type")
-		expected = "application/x-www-form-urlencoded"
-		if headerContentType != expected {
-			t.Errorf("Content-Type header = %q; want %q", headerContentType, expected)
-		}
-		body, err := ioutil.ReadAll(r.Body)
-		if err != nil {
-			t.Errorf("Failed reading request body: %s.", err)
-		}
-		expected = "grant_type=password&password=password1&scope=scope1+scope2&username=user1"
-		if string(body) != expected {
-			t.Errorf("res.Body = %q; want %q", string(body), expected)
-		}
-		w.Header().Set("Content-Type", "application/x-www-form-urlencoded")
-		w.Write([]byte("access_token=90d64460d14870c08c81352a05dedd3465940a7c&scope=user&token_type=bearer"))
-	}))
-	defer ts.Close()
-	conf := newConf(ts.URL)
-	tok, err := conf.PasswordCredentialsToken(context.Background(), "user1", "password1")
-	if err != nil {
-		t.Error(err)
-	}
-	if !tok.Valid() {
-		t.Fatalf("Token invalid. Got: %#v", tok)
-	}
-	expected := "90d64460d14870c08c81352a05dedd3465940a7c"
-	if tok.AccessToken != expected {
-		t.Errorf("AccessToken = %q; want %q", tok.AccessToken, expected)
-	}
-	expected = "bearer"
-	if tok.TokenType != expected {
-		t.Errorf("TokenType = %q; want %q", tok.TokenType, expected)
-	}
-}
-
-func TestTokenRefreshRequest(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.String() == "/somethingelse" {
-			return
-		}
-		if r.URL.String() != "/token" {
-			t.Errorf("Unexpected token refresh request URL, %v is found.", r.URL)
-		}
-		headerContentType := r.Header.Get("Content-Type")
-		if headerContentType != "application/x-www-form-urlencoded" {
-			t.Errorf("Unexpected Content-Type header, %v is found.", headerContentType)
-		}
-		body, _ := ioutil.ReadAll(r.Body)
-		if string(body) != "grant_type=refresh_token&refresh_token=REFRESH_TOKEN" {
-			t.Errorf("Unexpected refresh token payload, %v is found.", string(body))
-		}
-	}))
-	defer ts.Close()
-	conf := newConf(ts.URL)
-	c := conf.Client(context.Background(), &Token{RefreshToken: "REFRESH_TOKEN"})
-	c.Get(ts.URL + "/somethingelse")
-}
-
-func TestFetchWithNoRefreshToken(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.String() == "/somethingelse" {
-			return
-		}
-		if r.URL.String() != "/token" {
-			t.Errorf("Unexpected token refresh request URL, %v is found.", r.URL)
-		}
-		headerContentType := r.Header.Get("Content-Type")
-		if headerContentType != "application/x-www-form-urlencoded" {
-			t.Errorf("Unexpected Content-Type header, %v is found.", headerContentType)
-		}
-		body, _ := ioutil.ReadAll(r.Body)
-		if string(body) != "client_id=CLIENT_ID&grant_type=refresh_token&refresh_token=REFRESH_TOKEN" {
-			t.Errorf("Unexpected refresh token payload, %v is found.", string(body))
-		}
-	}))
-	defer ts.Close()
-	conf := newConf(ts.URL)
-	c := conf.Client(context.Background(), nil)
-	_, err := c.Get(ts.URL + "/somethingelse")
-	if err == nil {
-		t.Errorf("Fetch should return an error if no refresh token is set")
-	}
-}
-
-func TestTokenRetrieveError(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.String() != "/token" {
-			t.Errorf("Unexpected token refresh request URL, %v is found.", r.URL)
-		}
-		w.Header().Set("Content-type", "application/json")
-		w.WriteHeader(http.StatusBadRequest)
-		w.Write([]byte(`{"error": "invalid_grant"}`))
-	}))
-	defer ts.Close()
-	conf := newConf(ts.URL)
-	_, err := conf.Exchange(context.Background(), "exchange-code")
-	if err == nil {
-		t.Fatalf("got no error, expected one")
-	}
-	_, ok := err.(*RetrieveError)
-	if !ok {
-		t.Fatalf("got %T error, expected *RetrieveError", err)
-	}
-	// Test error string for backwards compatibility
-	expected := fmt.Sprintf("oauth2: cannot fetch token: %v\nResponse: %s", "400 Bad Request", `{"error": "invalid_grant"}`)
-	if errStr := err.Error(); errStr != expected {
-		t.Fatalf("got %#v, expected %#v", errStr, expected)
-	}
-}
-
-func TestRefreshToken_RefreshTokenReplacement(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
-		w.Write([]byte(`{"access_token":"ACCESS_TOKEN",  "scope": "user", "token_type": "bearer", "refresh_token": "NEW_REFRESH_TOKEN"}`))
-		return
-	}))
-	defer ts.Close()
-	conf := newConf(ts.URL)
-	tkr := conf.TokenSource(context.Background(), &Token{RefreshToken: "OLD_REFRESH_TOKEN"})
-	tk, err := tkr.Token()
-	if err != nil {
-		t.Errorf("got err = %v; want none", err)
-		return
-	}
-	if want := "NEW_REFRESH_TOKEN"; tk.RefreshToken != want {
-		t.Errorf("RefreshToken = %q; want %q", tk.RefreshToken, want)
-	}
-}
-
-func TestRefreshToken_RefreshTokenPreservation(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
-		w.Write([]byte(`{"access_token":"ACCESS_TOKEN",  "scope": "user", "token_type": "bearer"}`))
-		return
-	}))
-	defer ts.Close()
-	conf := newConf(ts.URL)
-	const oldRefreshToken = "OLD_REFRESH_TOKEN"
-	tkr := conf.TokenSource(context.Background(), &Token{RefreshToken: oldRefreshToken})
-	tk, err := tkr.Token()
-	if err != nil {
-		t.Fatalf("got err = %v; want none", err)
-	}
-	if tk.RefreshToken != oldRefreshToken {
-		t.Errorf("RefreshToken = %q; want %q", tk.RefreshToken, oldRefreshToken)
-	}
-}
-
-func TestConfigClientWithToken(t *testing.T) {
-	tok := &Token{
-		AccessToken: "abc123",
-	}
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if got, want := r.Header.Get("Authorization"), fmt.Sprintf("Bearer %s", tok.AccessToken); got != want {
-			t.Errorf("Authorization header = %q; want %q", got, want)
-		}
-		return
-	}))
-	defer ts.Close()
-	conf := newConf(ts.URL)
-
-	c := conf.Client(context.Background(), tok)
-	req, err := http.NewRequest("GET", ts.URL, nil)
-	if err != nil {
-		t.Error(err)
-	}
-	_, err = c.Do(req)
-	if err != nil {
-		t.Error(err)
-	}
-}
diff --git a/vendor/golang.org/x/oauth2/odnoklassniki/odnoklassniki.go b/vendor/golang.org/x/oauth2/odnoklassniki/odnoklassniki.go
deleted file mode 100644
index c0d093c..0000000
--- a/vendor/golang.org/x/oauth2/odnoklassniki/odnoklassniki.go
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package odnoklassniki provides constants for using OAuth2 to access Odnoklassniki.
-package odnoklassniki // import "golang.org/x/oauth2/odnoklassniki"
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is Odnoklassniki's OAuth 2.0 endpoint.
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://www.odnoklassniki.ru/oauth/authorize",
-	TokenURL: "https://api.odnoklassniki.ru/oauth/token.do",
-}
diff --git a/vendor/golang.org/x/oauth2/paypal/paypal.go b/vendor/golang.org/x/oauth2/paypal/paypal.go
deleted file mode 100644
index 2e713c5..0000000
--- a/vendor/golang.org/x/oauth2/paypal/paypal.go
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package paypal provides constants for using OAuth2 to access PayPal.
-package paypal // import "golang.org/x/oauth2/paypal"
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is PayPal's OAuth 2.0 endpoint in live (production) environment.
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://www.paypal.com/webapps/auth/protocol/openidconnect/v1/authorize",
-	TokenURL: "https://api.paypal.com/v1/identity/openidconnect/tokenservice",
-}
-
-// SandboxEndpoint is PayPal's OAuth 2.0 endpoint in sandbox (testing) environment.
-var SandboxEndpoint = oauth2.Endpoint{
-	AuthURL:  "https://www.sandbox.paypal.com/webapps/auth/protocol/openidconnect/v1/authorize",
-	TokenURL: "https://api.sandbox.paypal.com/v1/identity/openidconnect/tokenservice",
-}
diff --git a/vendor/golang.org/x/oauth2/slack/slack.go b/vendor/golang.org/x/oauth2/slack/slack.go
deleted file mode 100644
index 593d2f6..0000000
--- a/vendor/golang.org/x/oauth2/slack/slack.go
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2016 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package slack provides constants for using OAuth2 to access Slack.
-package slack // import "golang.org/x/oauth2/slack"
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is Slack's OAuth 2.0 endpoint.
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://slack.com/oauth/authorize",
-	TokenURL: "https://slack.com/api/oauth.access",
-}
diff --git a/vendor/golang.org/x/oauth2/spotify/spotify.go b/vendor/golang.org/x/oauth2/spotify/spotify.go
deleted file mode 100644
index c75416c..0000000
--- a/vendor/golang.org/x/oauth2/spotify/spotify.go
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2018 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package spotify provides constants for using OAuth2 to access Spotify.
-package spotify // import "golang.org/x/oauth2/spotify"
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is Spotify's OAuth 2.0 endpoint.
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://accounts.spotify.com/authorize",
-	TokenURL: "https://accounts.spotify.com/api/token",
-}
diff --git a/vendor/golang.org/x/oauth2/stackoverflow/stackoverflow.go b/vendor/golang.org/x/oauth2/stackoverflow/stackoverflow.go
deleted file mode 100644
index 82711f7..0000000
--- a/vendor/golang.org/x/oauth2/stackoverflow/stackoverflow.go
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2018 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package stackoverflow provides constants for using OAuth2 to access Stack Overflow.
-package stackoverflow // import "golang.org/x/oauth2/stackoverflow"
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is Stack Overflow's OAuth 2.0 endpoint.
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://stackoverflow.com/oauth",
-	TokenURL: "https://stackoverflow.com/oauth/access_token",
-}
diff --git a/vendor/golang.org/x/oauth2/token_test.go b/vendor/golang.org/x/oauth2/token_test.go
deleted file mode 100644
index 80db83c..0000000
--- a/vendor/golang.org/x/oauth2/token_test.go
+++ /dev/null
@@ -1,72 +0,0 @@
-// Copyright 2014 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package oauth2
-
-import (
-	"testing"
-	"time"
-)
-
-func TestTokenExtra(t *testing.T) {
-	type testCase struct {
-		key  string
-		val  interface{}
-		want interface{}
-	}
-	const key = "extra-key"
-	cases := []testCase{
-		{key: key, val: "abc", want: "abc"},
-		{key: key, val: 123, want: 123},
-		{key: key, val: "", want: ""},
-		{key: "other-key", val: "def", want: nil},
-	}
-	for _, tc := range cases {
-		extra := make(map[string]interface{})
-		extra[tc.key] = tc.val
-		tok := &Token{raw: extra}
-		if got, want := tok.Extra(key), tc.want; got != want {
-			t.Errorf("Extra(%q) = %q; want %q", key, got, want)
-		}
-	}
-}
-
-func TestTokenExpiry(t *testing.T) {
-	now := time.Now()
-	cases := []struct {
-		name string
-		tok  *Token
-		want bool
-	}{
-		{name: "12 seconds", tok: &Token{Expiry: now.Add(12 * time.Second)}, want: false},
-		{name: "10 seconds", tok: &Token{Expiry: now.Add(expiryDelta)}, want: true},
-		{name: "-1 hour", tok: &Token{Expiry: now.Add(-1 * time.Hour)}, want: true},
-	}
-	for _, tc := range cases {
-		if got, want := tc.tok.expired(), tc.want; got != want {
-			t.Errorf("expired (%q) = %v; want %v", tc.name, got, want)
-		}
-	}
-}
-
-func TestTokenTypeMethod(t *testing.T) {
-	cases := []struct {
-		name string
-		tok  *Token
-		want string
-	}{
-		{name: "bearer-mixed_case", tok: &Token{TokenType: "beAREr"}, want: "Bearer"},
-		{name: "default-bearer", tok: &Token{}, want: "Bearer"},
-		{name: "basic", tok: &Token{TokenType: "basic"}, want: "Basic"},
-		{name: "basic-capitalized", tok: &Token{TokenType: "Basic"}, want: "Basic"},
-		{name: "mac", tok: &Token{TokenType: "mac"}, want: "MAC"},
-		{name: "mac-caps", tok: &Token{TokenType: "MAC"}, want: "MAC"},
-		{name: "mac-mixed_case", tok: &Token{TokenType: "mAc"}, want: "MAC"},
-	}
-	for _, tc := range cases {
-		if got, want := tc.tok.Type(), tc.want; got != want {
-			t.Errorf("TokenType(%q) = %v; want %v", tc.name, got, want)
-		}
-	}
-}
diff --git a/vendor/golang.org/x/oauth2/transport_test.go b/vendor/golang.org/x/oauth2/transport_test.go
deleted file mode 100644
index faa87d5..0000000
--- a/vendor/golang.org/x/oauth2/transport_test.go
+++ /dev/null
@@ -1,168 +0,0 @@
-package oauth2
-
-import (
-	"errors"
-	"io"
-	"net/http"
-	"net/http/httptest"
-	"testing"
-	"time"
-)
-
-type tokenSource struct{ token *Token }
-
-func (t *tokenSource) Token() (*Token, error) {
-	return t.token, nil
-}
-
-func TestTransportNilTokenSource(t *testing.T) {
-	tr := &Transport{}
-	server := newMockServer(func(w http.ResponseWriter, r *http.Request) {})
-	defer server.Close()
-	client := &http.Client{Transport: tr}
-	resp, err := client.Get(server.URL)
-	if err == nil {
-		t.Errorf("got no errors, want an error with nil token source")
-	}
-	if resp != nil {
-		t.Errorf("Response = %v; want nil", resp)
-	}
-}
-
-type readCloseCounter struct {
-	CloseCount int
-	ReadErr    error
-}
-
-func (r *readCloseCounter) Read(b []byte) (int, error) {
-	return 0, r.ReadErr
-}
-
-func (r *readCloseCounter) Close() error {
-	r.CloseCount++
-	return nil
-}
-
-func TestTransportCloseRequestBody(t *testing.T) {
-	tr := &Transport{}
-	server := newMockServer(func(w http.ResponseWriter, r *http.Request) {})
-	defer server.Close()
-	client := &http.Client{Transport: tr}
-	body := &readCloseCounter{
-		ReadErr: errors.New("readCloseCounter.Read not implemented"),
-	}
-	resp, err := client.Post(server.URL, "application/json", body)
-	if err == nil {
-		t.Errorf("got no errors, want an error with nil token source")
-	}
-	if resp != nil {
-		t.Errorf("Response = %v; want nil", resp)
-	}
-	if expected := 1; body.CloseCount != expected {
-		t.Errorf("Body was closed %d times, expected %d", body.CloseCount, expected)
-	}
-}
-
-func TestTransportCloseRequestBodySuccess(t *testing.T) {
-	tr := &Transport{
-		Source: StaticTokenSource(&Token{
-			AccessToken: "abc",
-		}),
-	}
-	server := newMockServer(func(w http.ResponseWriter, r *http.Request) {})
-	defer server.Close()
-	client := &http.Client{Transport: tr}
-	body := &readCloseCounter{
-		ReadErr: io.EOF,
-	}
-	resp, err := client.Post(server.URL, "application/json", body)
-	if err != nil {
-		t.Errorf("got error %v; expected none", err)
-	}
-	if resp == nil {
-		t.Errorf("Response is nil; expected non-nil")
-	}
-	if expected := 1; body.CloseCount != expected {
-		t.Errorf("Body was closed %d times, expected %d", body.CloseCount, expected)
-	}
-}
-
-func TestTransportTokenSource(t *testing.T) {
-	ts := &tokenSource{
-		token: &Token{
-			AccessToken: "abc",
-		},
-	}
-	tr := &Transport{
-		Source: ts,
-	}
-	server := newMockServer(func(w http.ResponseWriter, r *http.Request) {
-		if got, want := r.Header.Get("Authorization"), "Bearer abc"; got != want {
-			t.Errorf("Authorization header = %q; want %q", got, want)
-		}
-	})
-	defer server.Close()
-	client := &http.Client{Transport: tr}
-	res, err := client.Get(server.URL)
-	if err != nil {
-		t.Fatal(err)
-	}
-	res.Body.Close()
-}
-
-// Test for case-sensitive token types, per https://github.com/golang/oauth2/issues/113
-func TestTransportTokenSourceTypes(t *testing.T) {
-	const val = "abc"
-	tests := []struct {
-		key  string
-		val  string
-		want string
-	}{
-		{key: "bearer", val: val, want: "Bearer abc"},
-		{key: "mac", val: val, want: "MAC abc"},
-		{key: "basic", val: val, want: "Basic abc"},
-	}
-	for _, tc := range tests {
-		ts := &tokenSource{
-			token: &Token{
-				AccessToken: tc.val,
-				TokenType:   tc.key,
-			},
-		}
-		tr := &Transport{
-			Source: ts,
-		}
-		server := newMockServer(func(w http.ResponseWriter, r *http.Request) {
-			if got, want := r.Header.Get("Authorization"), tc.want; got != want {
-				t.Errorf("Authorization header (%q) = %q; want %q", val, got, want)
-			}
-		})
-		defer server.Close()
-		client := &http.Client{Transport: tr}
-		res, err := client.Get(server.URL)
-		if err != nil {
-			t.Fatal(err)
-		}
-		res.Body.Close()
-	}
-}
-
-func TestTokenValidNoAccessToken(t *testing.T) {
-	token := &Token{}
-	if token.Valid() {
-		t.Errorf("got valid with no access token; want invalid")
-	}
-}
-
-func TestExpiredWithExpiry(t *testing.T) {
-	token := &Token{
-		Expiry: time.Now().Add(-5 * time.Hour),
-	}
-	if token.Valid() {
-		t.Errorf("got valid with expired token; want invalid")
-	}
-}
-
-func newMockServer(handler func(w http.ResponseWriter, r *http.Request)) *httptest.Server {
-	return httptest.NewServer(http.HandlerFunc(handler))
-}
diff --git a/vendor/golang.org/x/oauth2/twitch/twitch.go b/vendor/golang.org/x/oauth2/twitch/twitch.go
deleted file mode 100644
index 0838e7c..0000000
--- a/vendor/golang.org/x/oauth2/twitch/twitch.go
+++ /dev/null
@@ -1,19 +0,0 @@
-// Copyright 2017 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package twitch provides constants for using OAuth2 to access Twitch.
-package twitch // import "golang.org/x/oauth2/twitch"
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is Twitch's OAuth 2.0 endpoint.
-//
-// For more information see:
-// https://dev.twitch.tv/docs/authentication
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://id.twitch.tv/oauth2/authorize",
-	TokenURL: "https://id.twitch.tv/oauth2/token",
-}
diff --git a/vendor/golang.org/x/oauth2/uber/uber.go b/vendor/golang.org/x/oauth2/uber/uber.go
deleted file mode 100644
index 5520a64..0000000
--- a/vendor/golang.org/x/oauth2/uber/uber.go
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2016 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package uber provides constants for using OAuth2 to access Uber.
-package uber // import "golang.org/x/oauth2/uber"
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is Uber's OAuth 2.0 endpoint.
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://login.uber.com/oauth/v2/authorize",
-	TokenURL: "https://login.uber.com/oauth/v2/token",
-}
diff --git a/vendor/golang.org/x/oauth2/vk/vk.go b/vendor/golang.org/x/oauth2/vk/vk.go
deleted file mode 100644
index bd8e159..0000000
--- a/vendor/golang.org/x/oauth2/vk/vk.go
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package vk provides constants for using OAuth2 to access VK.com.
-package vk // import "golang.org/x/oauth2/vk"
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is VK's OAuth 2.0 endpoint.
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://oauth.vk.com/authorize",
-	TokenURL: "https://oauth.vk.com/access_token",
-}
diff --git a/vendor/golang.org/x/oauth2/yahoo/yahoo.go b/vendor/golang.org/x/oauth2/yahoo/yahoo.go
deleted file mode 100644
index 9fa78a2..0000000
--- a/vendor/golang.org/x/oauth2/yahoo/yahoo.go
+++ /dev/null
@@ -1,17 +0,0 @@
-// Copyright 2017 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package yahoo provides constants for using OAuth2 to access Yahoo.
-package yahoo // import "golang.org/x/oauth2/yahoo"
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is Yahoo's OAuth 2.0 endpoint.
-// See https://developer.yahoo.com/oauth2/guide/
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://api.login.yahoo.com/oauth2/request_auth",
-	TokenURL: "https://api.login.yahoo.com/oauth2/get_token",
-}
diff --git a/vendor/golang.org/x/oauth2/yandex/yandex.go b/vendor/golang.org/x/oauth2/yandex/yandex.go
deleted file mode 100644
index 5ebf666..0000000
--- a/vendor/golang.org/x/oauth2/yandex/yandex.go
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2017 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package yandex provides constants for using OAuth2 to access Yandex APIs.
-package yandex // import "golang.org/x/oauth2/yandex"
-
-import (
-	"golang.org/x/oauth2"
-)
-
-// Endpoint is the Yandex OAuth 2.0 endpoint.
-var Endpoint = oauth2.Endpoint{
-	AuthURL:  "https://oauth.yandex.com/authorize",
-	TokenURL: "https://oauth.yandex.com/token",
-}