Apple Sign In doesn't complete with Flutter

Issue

I'm developping an app using Flutter and Firebase Authentication.
I try to add the Apple Sign In in my Login page.
I'm following this tutorial https://dev.to/offlineprogrammer/flutter-firebase-authentication-apple-sign-in-1m64.
It works, Apple open the component in which I can log into

But when I want to insert my Password, it loads infinitly. If I put a wrong password, it failed immediately

I havn't any log, my code is stuck at

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

I tried on a iOS 15.0 simulator with flutter doctor as follow

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 2.5.0, on macOS 11.4 20F71 darwin-arm, locale
    fr-FR)
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
[✓] Xcode - develop for iOS and macOS
[✓] Chrome - develop for the web
[✓] Android Studio (version 4.1)
[✓] Android Studio (version 4.1)
[✓] Android Studio (version 4.1)
[✓] IntelliJ IDEA Ultimate Edition (version 2020.3.2)
[✓] VS Code (version 1.54.1)
[✓] Connected device (2 available)

• No issues found!

Solution

its a late answer, but if you you still facing it or anyone comes in the future:
Most likely you are using an iOS emulator which won't login, no matter how many times you tried to login and checked the password thousand time, I been there too... you need to use a real iOS.

And another advice, if you tried to send notifications, it won't either work on emulator, which is very clear in the documentation, but still some people miss it.

Answered By - Remoo