public ActionResult LogIn(UserModel user)
        {
            if (ModelState.IsValid)
            {
                if(user.Username == "neda" && user.Password == "jelic")
                {
                    FormsAuthentication.SetAuthCookie(user.Username, false);
                    return RedirectToAction("Index", "Home");
                }
            else
                {
                    ModelState.AddModelError("", "Podaci nijesu ispravni");
                }
            }

            return View(user);
        }
 public ActionResult Registration(UserModel user)
 {
     return View();
 }