private HipchatUser HipChatLogin(LoginViewModel login)
 {
     var service = new HipChatLoginService();
     try
     {
         var result = service.Login(login.Username, login.Password);
         return result;
     }
     catch(Exception ex)
     {
         return null;
     }
 }
        public ActionResult Login(LoginViewModel login)
        {
            if (!ModelState.IsValid)
            {
                ViewBag.Error = "Form is not valid; please review and try again.";
                return View("Login");
            }

            var user = HipChatLogin(login);
            if (user != null)
            {
                FormsAuthentication.RedirectFromLoginPage(user.Id.ToString(), true);
            }

            ViewBag.Error = "Credentials invalid. Please try again.";
            return View("Login");
        }