public void GCMRegisterError(string error)
 {
     PlayFabGoogleCloudMessaging.RegistrationComplete(null, error);
 }
        public void GCMRegistered(string token)
        {
            var error = (string.IsNullOrEmpty(token)) ? token : null;

            PlayFabGoogleCloudMessaging.RegistrationComplete(token, error);
        }