Google Sign In package's disconnect method call results in error when trying to sign in again using Flutter Firebase

Question

I am using Firebase auth with Flutter and have implemented google sign in using google_sign_in package version ^5.2.3 I noticed that after signing out, when I clicked sign in again the app didn't prompt me to select which of my google accounts I want to sign in it, instead logging me in with the previous account I had used.

After some research I added the following code in sign out flow

await GoogleSignIn().disconnect();
await FirebaseAuth.instance.signOut();

I was able to sign out, but when I tried to log in again, I got an exception with following message

PlatformException (PlatformException(exception, BAD_REQUEST, null, null))

HOWEVER, if I hot restart app, I am able to sign in and also get the prompt to select a google account I want to log in. The google sign in plugin github doesn't allow issue filing so I can't get help here. Help appreciated.

flutter doctor

$ flutter doctor
Doctor summary (to see all details, run flutter doctor -v): [√] Flutter (Channel stable, 2.8.1, on Microsoft Windows [Version 10.0.18362.535], locale en-US)

[.] Android toolchain - develop for Android devices (Android SDK version 30.0.0-rc2)

 X cmdline-tools component is missing Run `path/to/sdkmanager --install "cmdline-tools;latest"` See https://developer.android.com/studio/command-line for more details. X Android license status unknown. Run `flutter doctor --android-licenses` to accept the SDK licenses. See https://flutter.dev/docs/get-started/install/windows#android-setup for

more details.

[√] Chrome - develop for the web

[√] Android Studio (version 3.6)

[√] IntelliJ IDEA Community Edition (version 2018.1)

[.] IntelliJ IDEA Ultimate Edition (version 2016.2)

 X This install is older than the minimum recommended version of 2017.1.0.

[√] VS Code, 32-bit edition (version 1.63.2)

[√] Connected device (2 available)

. Doctor found issues in 2 categories.

Answer 1

I leave the answer as a reference for another person who has the same error.

     await GoogleSignIn().signOut();

Implementado en un IconButton:

 IconButton(
                  onPressed: (() async {
                    await FirebaseAuth.instance.signOut();
                    await GoogleSignIn().signOut();
                  }),
                  icon: const Icon(Icons.exit_to_app))