public ActionResult Index()
 {
     PMExternalUser PMUser = new PMExternalUser()
     {
         ExternalUser= new ExternalUser(),
         Lijst=DAExternalUser.LoadUsers()
     };
     return View(PMUser);
 }
        public ActionResult Index(PMExternalUser user)
        {
            int result = DAExternalUser.Insert(user.ExternalUser.Username, user.ExternalUser.Password);

            return RedirectToAction("Index") ;
        }