signInSite method
Returns the credentials state for a given user by SocialSignInResultInterface Get the credentials and authorization of social login, it will convert an authorization code obtained via Social sign into a session in your system. Throw exception when errors happen.
Implementation
Future<SocialSignInResultInterface> signInSite(
SocialPlatform site, BuildContext context) async {
throw UnimplementedError('signIn() has not been implemented.');
}