Flutter Firebase Permission Denied - firebase

Question

After i sign out, i try to log in again, yes it logs in succesfully but the problem is, i start to get error [cloud_firestore/permission-denied] but when i restart my application, it works again well. What am i missing?
PS: im logging in with Google.
This is my log in code:
Future signInWithGoogle() async {
// Trigger the authentication flow
final GoogleSignInAccount? googleUser = await GoogleSignIn().signIn();
// Obtain the auth details from the request
final GoogleSignInAuthentication googleAuth =
await googleUser!.authentication;
// Create a new credential
final credential = GoogleAuthProvider.credential(
accessToken: googleAuth.accessToken,
idToken: googleAuth.idToken,
);
// Once signed in, return the UserCredential
await _auth.signInWithCredential(credential);
}
This is my sign out code:
await _googleSignIn.signOut().then((value) async {
await widget.firebaseAuth.signOut().then((value) {
Navigator.pop(context);
});
}).onError((error, stackTrace) {
print(error);
ScaffoldMessenger.of(context).showSnackBar(SnackBar(
content: Text("ERROR!! TRY AGAIN"),
));
});

Answer 1

The cloud_firestore/permission-denied error comes from Firestore (the database), not from Firebase Authentication.
Most likely you have some realtime listeners in your code that require the user to be signed in, and those get rejected by the database once you sign the user out.
You can either remove the listeners by canceling the subscriptions, or you can ignore the errors, as the listeners are also canceled automatically after this error occurs.

Answer 2

In my case, I forgot to activate "google-sign in" as an authentication method in firebase.