protected void Login1_LoggingIn1(object sender, LoginCancelEventArgs e)
    {
        string  username = Login1.UserName;
        string  password = Login1.Password;
        AppUser appUser  = dao.findByUsernameAndPassword(username, password);

        if (appUser != null)
        {
            Session["loggedInAppUser"] = appUser;
        }
    }