public ActionResult GetAllVisitorsCategory()
        {
            VisitorsCategoryRepository visitorsCategoryRepository = new VisitorsCategoryRepository();

            ModelState.Clear();
            return(View(visitorsCategoryRepository.GetAllVisitorsCategory()));
        }
        public ActionResult Register()
        {
            var viewModel = new RegistrationViewModel()
            {
                Categories = visitorsCategoryRepository.GetAllVisitorsCategory()
            };

            return(View(viewModel));
        }