Flutter Getx: google signin and map data to firebase automatically logs me back in as same user? - flutter

Question

I am trying to login with google and have the data mapped to a firebase user. I'm using getX. So far this works HOWEVER it automatically logs me back in as the same user if I logout and then try to log back in again. I'll send the code for my login page and the page where the logout button is if needed, but I suspect this may have to do with my AuthController which I've included here
class AuthController extends GetxController {
static AuthController instance = Get.find();
GoogleSignIn googleSignIn = GoogleSignIn();
Rxn<User> firebaseUser = Rxn<User>();
Rxn<UserModel> firestoreUser = Rxn<UserModel>();
final RxBool admin = false.obs;
String usersCollection = "users";
#override
void onReady() async {
//run every time auth state changes
ever(firebaseUser, handleAuthChanged);
firebaseUser.bindStream(user);
super.onReady();
}
handleAuthChanged(firebaseUser) async {
//get user data from firestore
if (firebaseUser?.uid != null) {
firestoreUser.bindStream(streamFirestoreUser());
print("You are logged in as ${firebaseUser.email}");
await isAdmin();
}
//this is for new users
if (firebaseUser == null) {
print('Send to signin');
Get.offAll(LoginPage());
} else {
Get.offAll(AppSetup());
}
}
// Firebase user one-time fetch
Future<User> get getUser async => auth.currentUser!;
// Firebase user a realtime stream
Stream<User?> get user => auth.authStateChanges();
//Streams the firestore user from the firestore collection
Stream<UserModel> streamFirestoreUser() {
print('streamFirestoreUser()');
return firebaseFirestore
.doc('/users/${firebaseUser.value!.uid}')
.snapshots()
.map((snapshot) => UserModel.fromSnapshot(snapshot));
}
//get the firestore user from the firestore collection
Future<UserModel> getFirestoreUser() {
return firebaseFirestore
.doc('/users/${firebaseUser.value!.uid}')
.get()
.then((documentSnapshot) => UserModel.fromSnapshot(documentSnapshot));
}
//Method to handle user sign in using email and password
// User registration using email and password
googleLogin(BuildContext context) async {
final GoogleSignInAccount? googleUser = await googleSignIn.signIn();
if (googleUser != null) {
final googleAuth = await googleUser.authentication;
if (googleAuth.accessToken != null && googleAuth.idToken != null) {
try {
await auth
.signInWithCredential(
GoogleAuthProvider.credential(
idToken: googleAuth.idToken,
accessToken: googleAuth.accessToken),
)
.then((firebaseUser) async {
print('uid: ' + firebaseUser.user!.uid.toString());
print('email: ' + firebaseUser.user!.email.toString());
//create the new user object from the login modelled data
UserModel _newUser = UserModel(
id: firebaseUser.user!.uid,
email: firebaseUser.user!.email!,
name: firebaseUser.user!.email!,
photoURL: firebaseUser.user!.photoURL,
cart: [],
);
//create the user in firestore here with the _addUserToFirestore function
_updateUserFirestore(_newUser, firebaseUser.user!);
});
} on FirebaseAuthException catch (error) {
Get.snackbar('auth.signUpErrorTitle'.tr, error.message!,
snackPosition: SnackPosition.BOTTOM,
duration: Duration(seconds: 10),
backgroundColor: Get.theme.snackBarTheme.backgroundColor,
colorText: Get.theme.snackBarTheme.actionTextColor);
}
}
}
}
void _updateUserFirestore(UserModel user, User _firebaseUser) {
firebaseFirestore.doc('/users/${_firebaseUser.uid}').update(user.toJson());
update();
}
updateUserData(Map<String, dynamic> data) {
logger.i("UPDATED");
firebaseFirestore
.collection(usersCollection)
.doc(firebaseUser.value!.uid)
.update(data);
}
//check if user is an admin user
isAdmin() async {
await getUser.then((user) async {
DocumentSnapshot adminRef =
await firebaseFirestore.collection('admin').doc(user.uid).get();
if (adminRef.exists) {
admin.value = true;
} else {
admin.value = false;
}
update();
});
}
// This is the proper sign out method!
Future<void> signOut() {
return auth.signOut();
}
}

Answer 1

Simply add this line of code into your logout function
> await googleSignIn.signOut()