Firebase oauth2

using Firebase.Auth;
using Firebase.Auth.Providers;
using Firebase.Auth.Repository;
await Login();
async Task Login()
{
    // Configure...
    var config = new FirebaseAuthConfig
    {
        ApiKey = "<Your ApiKey >",
        AuthDomain = "<Your AuthDomain>",
        Providers = new FirebaseAuthProvider[]
        {
            new GoogleProvider(),
        },
        UserRepository = new FileUserRepository("FirebaseSample")
    };

    var client = new FirebaseAuthClient(config);
    var userCredential = await client.SignInWithRedirectAsync(FirebaseProviderType.Google, uri =>
    {
        Console.WriteLine(uri);
        return Task.FromResult(Console.ReadLine());
    });
}