Flutter: Sign in with ID token (native sign-in)

Allows you to perform native Google, Apple, and Facebook sign in by combining it with google_sign_in, sign_in_with_apple, or flutter_facebook_auth packages.

Parameters

• provider

  (Required)

  The provider to perform the sign in with.

• idToken

  (Required)

  The identity token obtained from the third-party provider.

• accessToken

  (Optional)

  Access token obtained from the third-party provider. Required for Google sign in.

• nonce

  (Optional)

  Raw nonce value used to perform the third-party sign in. Required for Apple sign-in.

• captchaToken

  (Optional)

  The captcha token to be used for captcha verification.

Examples

Native Google sign in

import 'package:google_sign_in/google_sign_in.dart';
import 'package:supabase_flutter/supabase_flutter.dart';

const webClientId = '<web client ID that you registered on Google Cloud, for example my-web.apps.googleusercontent.com>';

const iosClientId = '<iOS client ID that you registered on Google Cloud, for example my-ios.apps.googleusercontent.com';

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;

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

final response = await supabase.auth.signInWithIdToken(
  provider: OAuthProvider.google,
  idToken: idToken,
  accessToken: accessToken,
);

Native Apple Sign in

import 'package:sign_in_with_apple/sign_in_with_apple.dart';
import 'package:supabase_flutter/supabase_flutter.dart';
import 'package:crypto/crypto.dart';

/// Performs Apple sign in on iOS or macOS
final rawNonce = supabase.auth.generateRawNonce();
final hashedNonce = sha256.convert(utf8.encode(rawNonce)).toString();

final credential = await SignInWithApple.getAppleIDCredential(
  scopes: [
    AppleIDAuthorizationScopes.email,
    AppleIDAuthorizationScopes.fullName,
  ],
  nonce: hashedNonce,
);

final idToken = credential.identityToken;
if (idToken == null) {
  throw const AuthException(
    'Could not find ID Token from generated credential.',
  );
}

final response = await supabase.auth.signInWithIdToken(
  provider: OAuthProvider.apple,
  idToken: idToken,
  nonce: rawNonce,
);

Native Facebook Sign in

import 'package:flutter_facebook_auth/flutter_facebook_auth.dart';
import 'package:supabase_flutter/supabase_flutter.dart';

Future<void> signInWithFacebook() async {
  final LoginResult result = await FacebookAuth.instance.login(
    permissions: ['public_profile', 'email'],
  );

  if (result.status == LoginStatus.success) {
    final accessToken = result.accessToken!.tokenString;

    final response = await supabase.auth.signInWithIdToken(
      provider: OAuthProvider.facebook,
      idToken: accessToken,
    );
  } else {
    throw const AuthException(
      'Facebook login failed: ${result.status}',
    );
  }
}