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Oct 6, 2025
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docs: update google_sign_in example #1240

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25 changes: 14 additions & 11 deletions packages/supabase_flutter/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -136,6 +136,8 @@ Once you have registered your app and created the client IDs, add the web client

At this point you can perform native Google sign in using the following code. Be sure to replace the `webClientId` and `iosClientId` with your own.

The following example is very basic. Please refer to the [google_sign_in](https://pub.dev/packages/google_sign_in) package for the correct details.

```dart
import 'package:google_sign_in/google_sign_in.dart';
import 'package:supabase_flutter/supabase_flutter.dart';
Expand All @@ -156,18 +158,19 @@ Future<AuthResponse> _googleSignIn() async {
// Google sign in on Android will work without providing the Android
// Client ID registered on Google Cloud.

final GoogleSignIn googleSignIn = GoogleSignIn(
clientId: iosClientId,
serverClientId: webClientId,
);
final googleUser = await googleSignIn.signIn();
final googleAuth = await googleUser!.authentication;
final accessToken = googleAuth.accessToken;
final idToken = googleAuth.idToken;
final GoogleSignIn signIn = GoogleSignIn.instance;

// At the start of your app, initialize the GoogleSignIn instance
unawaited(
signIn.initialize(clientId: iosClientId, serverClientId: webClientId));

// Perform the sign in
final googleAccount = await signIn.authenticate();
final googleAuthorization = await googleAccount.authorizationClient.authorizationForScopes([]);
final googleAuthentication = googleAccount!.authentication;
final idToken = googleAuthentication.idToken;
final accessToken = googleAuthorization.accessToken;

if (accessToken == null) {
throw 'No Access Token found.';
}
if (idToken == null) {
throw 'No ID Token found.';
}
Expand Down