I have followed all the steps from here, I also added the SHA1 key in firebase console.
This is my code
void handleGoogleSignIn() async {
String errorMessage = "success";
GoogleSignInAccount _googleSignInAccount = await _googleSignIn.signIn();
GoogleSignInAuthentication googleSignInAuthentication =
await _googleSignInAccount.authentication;
AuthCredential _credential = GoogleAuthProvider.getCredential(
idToken: googleSignInAuthentication.idToken,
accessToken: googleSignInAuthentication.accessToken);
try {
AuthResult _authResult = await _auth.signInWithCredential(_credential);
} catch (error) {
switch (error.code) {
case "ERROR_INVALID_CREDENTIAL":
errorMessage = "Invalid credentials";
break;
case "ERROR_ACCOUNT_EXISTS_WITH_DIFFERENT_CREDENTIAL":
errorMessage = "This accouont exists withother credentials";
break;
case "ERROR_OPERATION_NOT_ALLOWED":
errorMessage = "Signing in with Email and Password is not enabled.";
break;
default:
errorMessage = "An undefined Error happened.";
}
}
showErrorOrNavigate(errorMessage);
}
I created a debug. keystore by following these steps
Exception: PlatformException(sign_in_failed, com.google.android.gms.common.api.ApiException: 10: , null) E/flutter (30467): #0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:569:7) E/flutter (30467): #1 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:321:33) E/flutter (30467): E/flutter (30467): #2 MethodChannel.invokeMapMethod (package:flutter/src/services/platform_channel.dart:349:48) E/flutter (30467): #3 MethodChannelGoogleSignIn.signIn (package:google_sign_in_platform_interface/src/method_channel_google_sign_in.dart:45:10)`
Proof of SHA1 key added in firebase console:

I am not able to find my mistake.
Today I found a way to handle it. After read this discussion: https://github.com/flutter/friendlychat-steps/issues/27
Take a look at this answer:
In Step 5, the signing key is the debug signing certificate (SHA-1) described in Configure Firebase for Android. You retrieved it from your development machine and copied it to the dialog in Firebase Console.
This key has to be from the machine you're developing on. If you have both a workstation and a laptop, make sure it matches the one where you're running friendlychat.
Well, I search for a new way to generate SHA-1 and reach this discussion: Generate SHA-1 for Flutter app
Try it! I hope it help you.
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