[HttpPost]
        public IActionResult Login(LoginUserDto user)
        {
            var result = loginUser.Execute(user);
            if(result != null)
            {
                HttpContext.Session.Set("User", result); //Cannot convert from .../ShowUserDto to byte[]
                return RedirectToAction("Index", "Movies");
            }

            TempData["error"] = "Email and/or password incorrect";
            return View();
        }
        
        
        //a ovako izgleda EfCommanda
        //ShowUserDto sadrzi sve podatke o korisniku. Onaj Json.Serialize object kao da ne radi svoj posao
        //je l pravim neku drugu gresku ?
        
        public ShowUserDto Execute(LoginUserDto request)
        {
            var user = Context.Users.Where(x => x.Email.ToLower() == request.Email.ToLower()).Where(p => p.Password == request.Password).FirstOrDefault();

            if (user == null || user.IsDeleted == true)
                throw new ArgumentException("Invalid credentials, try again.");

            return new ShowUserDto
            {
                FirstName = user.FirstName,
                LastName = user.LastName,
                Email = user.Email,
                Id = user.Id,
                RoleId = user.RoleId,
                Username = user.Username
            };
        }