private void btnAccept_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(this.UserName) && string.IsNullOrEmpty(this.Password))
            {
                this.ShowWarning("Username atau Password wajib diisi!");
                return;
            }

            try
            {
                _presenter.ExecuteLogin();
            }
            catch (Exception ex)
            {
                MethodBase.GetCurrentMethod().Fatal("An error occured while trying to login", ex);
                this.ShowError("Proses login gagal!");
            }
        }