replacing Auth/FSTUser by C++ auth implementation (#804)

* replacing Auth/FSTUser by C++ auth implementation

* address changes

2 files changed, 12 insertions, 4 deletions

diff --git a/Firestore/Source/Remote/FSTRemoteStore.h b/Firestore/Source/Remote/FSTRemoteStore.h
index b5dd204..4ea9379 100644
--- a/Firestore/Source/Remote/FSTRemoteStore.h
+++ b/Firestore/Source/Remote/FSTRemoteStore.h
@@ -19,6 +19,8 @@
 #import "Firestore/Source/Core/FSTTypes.h"
 #import "Firestore/Source/Model/FSTDocumentVersionDictionary.h"
 
+#include "Firestore/core/src/firebase/firestore/auth/user.h"
+
 @class FSTDatastore;
 @class FSTDocumentKey;
 @class FSTLocalStore;
@@ -28,7 +30,6 @@
 @class FSTQueryData;
 @class FSTRemoteEvent;
 @class FSTTransaction;
-@class FSTUser;
 
 NS_ASSUME_NONNULL_BEGIN
 
@@ -121,7 +122,7 @@ NS_ASSUME_NONNULL_BEGIN
  * In response the remote store tears down streams and clears up any tracked operations that should
  * not persist across users. Restarts the streams if appropriate.
  */
-- (void)userDidChange:(FSTUser *)user;
+- (void)userDidChange:(const firebase::firestore::auth::User &)user;
 
 /** Listens to the target identified by the given FSTQueryData. */
 - (void)listenToTargetWithQueryData:(FSTQueryData *)queryData;
diff --git a/Firestore/Source/Remote/FSTRemoteStore.mm b/Firestore/Source/Remote/FSTRemoteStore.mm
index 123df49..c6668bf 100644
--- a/Firestore/Source/Remote/FSTRemoteStore.mm
+++ b/Firestore/Source/Remote/FSTRemoteStore.mm
@@ -35,6 +35,12 @@
 #import "Firestore/Source/Util/FSTAssert.h"
 #import "Firestore/Source/Util/FSTLogger.h"
 
+#include "Firestore/core/src/firebase/firestore/auth/user.h"
+#include "Firestore/core/src/firebase/firestore/util/string_apple.h"
+
+namespace util = firebase::firestore::util;
+using firebase::firestore::auth::User;
+
 NS_ASSUME_NONNULL_BEGIN
 
 /**
@@ -268,8 +274,9 @@ static const int kOnlineAttemptsBeforeFailure = 2;
   [self updateOnlineState:FSTOnlineStateUnknown];
 }
 
-- (void)userDidChange:(FSTUser *)user {
-  FSTLog(@"FSTRemoteStore %p changing users: %@", (__bridge void *)self, user);
+- (void)userDidChange:(const User &)user {
+  FSTLog(@"FSTRemoteStore %p changing users: %@", (__bridge void *)self,
+         util::WrapNSStringNoCopy(user.uid()));
   if ([self isNetworkEnabled]) {
     // Tear down and re-create our network streams. This will ensure we get a fresh auth token
     // for the new user and re-fill the write pipeline with new mutations from the LocalStore