This is a simple Flutter plugin to disable Android Smart Lock auto-sign-in.


When you use flutter_auth_ui with enableSmartLock on, the credential is saved on Firebase's credential store and it can be deleted using FirebaseAuth.instance.signOut.

But on the next signing in, Google Smart Lock automatically signs in using the last used credential and it results in infinite signing in loop as described here.

The plugin provides you with a way to disable the auto signing in using CredentialsClient.disableAutoSignIn and GoogleSignIn.signOut.


The following fragment illustrates the way to sign out the current user completely:

import 'package:android_disable_auto_sign_in/android_disable_auto_sign_in.dart';
import 'package:firebase_auth/firebase_auth.dart';


/// Sign out from Firebase normally
await FirebaseAuth.instance.signOut();
/// And, this will remove Google Smart Lock credential cache
await AndroidDisableAutoSignIn.smartLockSignOut();

How to run the example code

To make the example work on your environment, you should do the following steps:

  • Update applicationId on example/android/app/build.gradle to your own application ID:
android {

    defaultConfig {
        // TODO: Specify your own unique Application ID (
        applicationId "jp.espresso3389.android_disable_auto_sign_in_example"