private bool IsValid(UserModel user)
        {
            if (user.Password != "guest" || user.UserName != "guestpro")
                return false;

            return true;
        }
 //
 // GET: /Account/
 public ActionResult LogOn(UserModel user)
 {
     if (!IsValid(user))
     {
         this.Response.Clear();
         return Json(false);
     }
     else
     {
         AuthUser(user);
         return Json(true);
     }
 }
 private void AuthUser(UserModel user)
 {
     IAuthenticator authenticator = new CookieAuthenticator();
     authenticator.SetCookie(user.UserName, true);
 }