missing initial state while login with apple in flutter andoid device

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1

when i try to login in android device with apple in a flutter app, it fails and shows “Unable to process request due to missing initial state. This may happen if browser sessionStorage is inaccessible or accidentally cleared. Some specific scenarios are - 1) Using IDP-Initiated SAML SSO. 2) Using signInWithRedirect in a storage-partitioned browser environment.” but works with apple devices. Here is my implemented code below:

Future<UserModel> signInWithApple() async {
  final AuthorizationCredentialAppleID credential =
      await SignInWithApple.getAppleIDCredential(
    scopes: [
      AppleIDAuthorizationScopes.email,
      AppleIDAuthorizationScopes.fullName
    ],
    webAuthenticationOptions: WebAuthenticationOptions(
      clientId: '...',
      redirectUri: Uri.parse(
        '...',
      ),
    ),
  );

  // Authenticate with Firebase using Apple credentials
  final OAuthCredential oAuthCredential = 
  OAuthProvider("apple.com").credential(
    idToken: credential.identityToken,
    accessToken: credential.authorizationCode,
  );

  final UserCredential firebaseUserCredential =
      await 
FirebaseAuth.instance.signInWithCredential(oAuthCredential);

  // Get the ID token from Firebase
  final idToken = await 
firebaseUserCredential.user?.getIdToken();

  final response = await http.post(
    Uri.parse('$baseUrl/oauthlogin'),
    headers: {
      'Content-Type': 'application/json',
    },
    body: jsonEncode({'idToken': idToken}),
  );

  if (response.statusCode == 200) {
    final data = json.decode(response.body);
    final token = data['token'];
     if (token != null) {
        await _preferenceManager.setUserToken(token);
     }
    return UserModel.fromJson(data);
  } else {
    throw Exception('Anmeldung bei Apple fehlgeschlagen');
   }
 }
2

You actually don’t need the SignInWithApple package.

Firebase Auth is capable of providing native Sign In With Apple for iOS and OAUTH 2 (webbrowser) for Android.

All you need to write is this:

final appleAuthProvider =
    AppleAuthProvider()
      ..addScope("email")
      ..addScope("name");

final credential = await FirebaseAuth.instance.signInWithProvider(
  appleAuthProvider,
);

Just follow the instructions provided in the Firebase console.