protected void initSignin() {
    SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
    is_signed_in = preferences.getInt("SIGN_IN", 0);
    String username = preferences.getString("USER_EMAIL", "");

    if (is_signed_in == 1) {
      UserDataHolder userDataHolder = UserDataHolder.getInstance();
      userDataHolder.setUsername(username);
    } else {
      Toast.makeText(
              getBaseContext(), "You must SignUp with NewzUp to post News.", Toast.LENGTH_LONG)
          .show();
      Handler handler = new Handler();
      handler.postDelayed(
          new Runnable() {
            public void run() {
              finish();
            }
          },
          3000);
    }
  }