google_sign_in 7.1.0 required serverClientId for Android

Hello everyone, I just upgraded google_sign_in from 6.2.2 to 7.1.0 and encountered this error:

GoogleSignInException(code GoogleSignInExceptionCode.clientConfigurationError, serverClientId must be provided on Android, null

I managed to fix this issue by providing my web client ID instead of the Android one.

What I don't understand is that in the integration docs, it stated that I don't need serverClientId if I already provided google-services.json

If you are not using google-services.json, you need to pass the client ID of the web application you registered as the serverClientId when initialising the GoogleSignIn instance.

Hope anyone can help me understand more about this issue and clear up any misunderstanding on my side.

Thank you.

Please provide complete details about your configuration, since without that there's no way for us to know whether that error message is expected or not. In particular:

Had you correctly followed all of these setup instructions?
What was the code that reproduced this error, including setup such as initialize and the call that threw that exception?

Yes, I followed the setup instructions.

The code below is called in the main function

static void initialize() async {
  final GoogleSignIn googleSignIn = GoogleSignIn.instance;
  await googleSignIn.initialize();
  
  googleSignIn.authenticationEvents.listen((
    GoogleSignInAuthenticationEvent event,
  ) {
    if (event is GoogleSignInAuthenticationEventSignIn) {
      String? idToken = event.user.authentication.idToken;
      if (idToken == null) {
        return;
      }
      _handleSessionSignIn(idToken);
    }
  });
}

When the code below is called, the error I mentioned is thrown

static Future<void> signIn() async {
  try {
    final GoogleSignInAccount googleUser = await GoogleSignIn.instance.authenticate();
    final GoogleSignInAuthentication googleAuth = googleUser.authentication;

    await _handleSessionSignIn(googleAuth.idToken as String);
  } catch (e) {
    developer.log(e.toString(), name: 'hehe error signin');
    throw (e.toString());
  }
}

It works if I initialise it with serverClientId

await googleSignIn.initialize(serverClientId: 'xyz.apps.googleusercontent.com');

When you do a debug build of your app, do you have a build/app/generated/res/processDebugGoogleServices/values/values.xml containing default_web_client_id?

Also, are you ensuring that your initialize() has completed before calling your signIn() method? You aren't declaring it as returning a Future, which suggests that you aren't awaiting its completion.

I ran into this today I was able to solve this by passing the serverClientId (aka client_id from Google cloud console). Anyone running into this issue initlialize the GoogleSignIn instance with a serverClientId before accessing other apis

Go to Google Cloud Console:
Select your project.
Navigate to APIs & Services → Credentials.
Under OAuth 2.0 Client IDs, find the Web client (not Android or iOS).

Copy the Client ID listed there — this is your serverClientId.

 _googleSignIn.initialize(
      serverClientId: <clientId here>
   );

and then use the other apis

  final GoogleSignInAccount result = await _googleSignIn.authenticate();
  final googleKey = result.authentication;
  final GoogleSignInClientAuthorization? authorization =
        await result.authorizationClient.authorizationForScopes(scopes);
...

@stuartmorgan-g

@stuartmorgan-g I can't find build/app/generated/res/processDebugGoogleServices/values/values.xml in my project.

You are correct that I did not ensure initialize() completed before calling signIn(). So I tried to await the initialisation then immediately call the signIn method and still managed to reproduce the same error

final GoogleSignIn googleSignIn = GoogleSignIn.instance;
await googleSignIn.initialize();
signIn();

GoogleSignInException(code GoogleSignInExceptionCode.clientConfigurationError, serverClientId must be provided on Android, null)

I can't find build/app/generated/res/processDebugGoogleServices/values/values.xml in my project.

Are you using Firebase for anything other than the google_sign_in configuration? It sounds like this step may not be configured correctly for your project.

I just faced the same issue with version 7.0.1.

( 3879): Error during sign in: GoogleSignInException(code GoogleSignInExceptionCode.clientConfigurationError, serverClientId must be provided on Android, null)

I have the google-services.json file, and I'm using the Google Sign In directly instead of using the Firebase Auth. I have added the iOS and Android OAuth clients, and I do not have a server/website.

I can't find build/app/generated/res/processDebugGoogleServices/values/values.xml in my project.

Are you using Firebase for anything other than the google_sign_in configuration? It sounds like this step may not be configured correctly for your project.

I also use Firebase for Crashlytics and it works fine.

My project structure looks different from the setup, maybe due to an old project. I will try to reproduce this in a newly created project.

[google_sign_in] Add more serverClientId info to README (flutter#9629)

@maheshj01

Thank you @maheshj01 for the clear step by step explanations, they solved this error. It is strange we have to hardcode the client id, but if thats the way then so be it.

If we need to call the initialize method before authenticate, then the code example in this documentation is misleading.

https://firebase.google.com/docs/auth/flutter/federated-auth#google

[google_sign_in] Add more serverClientId info to README (flutter#9629)

I faced the same issue when migrating from 6.1.2 to 7.1.1.
The solution that worked for me was running the following command :

dart pub global activate flutterfire_cli

This updates flutterfire_cli to the latest version. After that, I re-ran the FlutterFire configuration, which regenerated the google-services.json file along with the required folders, and that fixed the bug

I faced the same issue when migrating from 6.1.2 to 7.1.1. The solution that worked for me was running the following command :

dart pub global activate flutterfire_cli

This updates flutterfire_cli to the latest version. After that, I re-ran the FlutterFire configuration, which regenerated the google-services.json file along with the required folders, and that fixed the bug

this works

I solved the problem using the explanation and using an Android emulator with the Play Store. For now, works fine in debug for me.

I solved it by adding this in main.dart

await GoogleSignIn.instance.initialize();

If this doesn't work try creating OAuth client ID and add your app and SHA1 key, if already exists then try updating SHA1 key by performing

cd android
.\gradlew signingReport

from your project terminal

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.

[google_sign_in] Add more serverClientId info to README (flutter#9629)

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`google_sign_in 7.1.0` required `serverClientId` for Android #172073