public void UploadScore()
    {
        string user_id  = FBController.getInstance().GetUserId();
        string username = FBController.getInstance().GetUsername();

        if (user_id == "")
        {
            user_id  = "0";
            username = "******";
        }

        StartCoroutine(ApiController.getInstance().HttpRequestAsync(
                           "score.php",
                           new Dictionary <string, string>()
        {
            { "user_id", user_id },
            { "score", "" + score },
            { "username", username }
        },
                           ApiController.TYPE_POST, callback));
    }
 public void LoginByFacebook()
 {
     FBController.getInstance().LoginToFacebook();
 }