signInWithGoogle static method

Future<User?> signInWithGoogle({ required BuildContext context, })

Implementation

static Future<User?> signInWithGoogle({required BuildContext context}) async {
  FirebaseAuth auth = FirebaseAuth.instance;
  User? user;

  final GoogleSignIn googleSignIn = GoogleSignIn();

  final GoogleSignInAccount? googleSignInAccount =
      await googleSignIn.signIn();

  if (googleSignInAccount != null) {
    final GoogleSignInAuthentication googleSignInAuthentication =
        await googleSignInAccount.authentication;

    final AuthCredential credential = GoogleAuthProvider.credential(
      accessToken: googleSignInAuthentication.accessToken,
      idToken: googleSignInAuthentication.idToken,
    );

    try {
      final UserCredential userCredential =
          await auth.signInWithCredential(credential);

      user = userCredential.user;
    } on FirebaseAuthException catch (e) {
      if (e.code == 'account-exists-with-different-credential') {
        ScaffoldMessenger.of(context).showSnackBar(
          Authentication.customSnackBar(
            content:
                'The account already exists with a different credential.',
          ),
        );
      } else if (e.code == 'invalid-credential') {
        ScaffoldMessenger.of(context).showSnackBar(
          Authentication.customSnackBar(
            content: 'Error occurred while accessing credentials. Try again.',
          ),
        );
      }
    } catch (e) {
      ScaffoldMessenger.of(context).showSnackBar(
        Authentication.customSnackBar(
          content: 'Error occurred using Google Sign-In. Try again.',
        ),
      );
    }
  }

  return user;
}