void Start()
    {
        PlayGamesClientConfiguration config = new PlayGamesClientConfiguration.Builder().Build();

        PlayGamesPlatform.InitializeInstance(config);
        //PlayGamesPlatform.DebugLogEnabled = true;
        PlayGamesPlatform.Activate();
        PlayGamesScript.SignIn();
    }
 //used for the google login button
 public void SignIn()
 {
     PlayGamesScript.SignIn();
 }