@Override
  protected void onResume() {
    super.onResume();
    overridePendingTransition(R.anim.up_in, R.anim.up_out);
    String stringToken = Preferences.getAppToken(LoginActivity.this);

    // When we have token persisted just start FeedActivity
    if (stringToken != null && !TextUtils.isEmpty(stringToken)) {
      this.stringToken = stringToken;
      startFeedActivity();
    }
  }
 @Override
 public void onSuccess(Token token) {
   LoginActivity.this.stringToken = token.getToken();
   Preferences.saveAppToken(stringToken, LoginActivity.this);
   startFeedActivity();
 }