public ActionResult Login(admin model)
 {
     if (ModelState.IsValid)
     {
         var pwd = Hash.EncMD5(model.pwd);
         int admin_id;
         var token = loginSV.LoginAdmin(model.email, pwd, out admin_id);
         if (token != null)
         {
             Session["token"] = token;
             Session["admin"] = viewSV.Get_admin(token, admin_id, admin_id).FirstOrDefault();
             return(RedirectToAction("Index", "Dashboard"));
         }
     }
     else
     {
         ViewBag.HtmlStr = "<div class=\"alert alert-rose alert-with-icon col-md-6 col-md-offset-3\" data-notify=\"container\"><i class=\"material-icons\" data-notify=\"icon\">notifications</i><button type = \"button\" aria-hidden=\"true\" class=\"close\"><i class=\"material-icons\">close</i></button><span data-notify=\"message\">Insert Error!.</span></div>";
         RedirectToAction("Login", "main");
     }
     return(View());
 }