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Flutter: PlatformException when trying to get Google Sign-In access token

I'm experiencing an issue with Google Sign-In in my Flutter application. When attempting to sign in with Google, I receive a PlatformException. Here's the error log:

W/Auth    (10169): [GoogleAuthUtil] [GoogleAuthUtil] error status:UNKNOWN with method:getTokenWithDetails
...
I/flutter (10169): error: PlatformException(exception, ERROR, null, null)
E/flutter (10169): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: PlatformException(exception, ERROR, null, null)
E/flutter (10169): #0 GoogleSignInApi.getAccessToken (package:google_sign_in_android/src/messages.g.dart:250:7)
E/flutter (10169): <asynchronous suspension>
E/flutter (10169): #1 GoogleSignInAndroid.getTokens.<anonymous closure> (package:google_sign_in_android/google_sign_in_android.dart:68:15)
E/flutter (10169): <asynchronous suspension>
E/flutter (10169): #2 GoogleSignInAccount.authentication (package:google_sign_in/google_sign_in.dart:95:9)
E/flutter (10169): <asynchronous suspension>
E/flutter (10169): #3 GoogleLoginProvider.getAuthCredential (package:firebase_manager/src/auth/login/providers/google_login_provider.dart:15:11)
E/flutter (10169): <asynchronous suspension>
E/flutter (10169): #4 LoginTool.loginByGoogle (package:firebase_manager/src/auth/login/login_tool.dart:36:37)
E/flutter (10169): <asynchronous suspension>
E/flutter (10169): #5 StatePage.build.<anonymous closure> (package:saiwai/ui/loginpage/login_page.dart:80:42)
E/flutter (10169): <asynchronous suspension>
E/flutter (10169):

I've tried the following steps to resolve the issue:

  1. Updated all dependencies to their latest versions
  2. Checked and updated the SHA-1 fingerprint in the Firebase console
  3. Verified the Firebase configuration files (google-services.json)
  4. flutter clean

Despite these efforts, the error persists. I'm using the latest stable version of Flutter and testing on an Android device.

Here's a snippet of my code where the error occurs:

  Future<OAuthCredential?> getAuthCredential() async {
    // Trigger the authentication flow
    final GoogleSignInAccount? googleUser = await googleSignIn.signIn();
    if (googleUser != null) {
      // Obtain the auth details from the request
      final GoogleSignInAuthentication googleAuth =
          await googleUser.authentication;
      // Create a new credential
      return GoogleAuthProvider.credential(
        accessToken: googleAuth.accessToken,
        idToken: googleAuth.idToken,
      );
    }
    return null;
  }

Can anyone suggest what might be causing this issue or how to further diagnose and resolve it? Any help would be greatly appreciated.

Solution

  • This worked for me

    GoogleSignInAuthentication? googleSignInAuthentication =
    await (await GoogleSignIn(
    scopes: ["profile", "email"],
).signIn())
    ?.authentication;