public override bool OnCreateOptionsMenu(ActionBar_Sherlock.View.IMenu menu)
        {
            base.OnCreateOptionsMenu (menu);
            var isLoggedIn = ParseUser.CurrentUser != null;
            var loginLogoutResourceText = isLoggedIn ? Resource.String.logoutMenuItem : Resource.String.loginMenuItem;
            menu.Add (0, AppConstants.LoginLogoutMenuItemId, 100, loginLogoutResourceText);

            return true;
        }