public async Task <IActionResult> GetUpdate(int id)
        {
            try
            {
                var entity = await Manager.FindById(id);

                var TravellersList = await TravellersManager.All();

                var TravelList = await TravelsManager.All();

                RequestsViewModel viewModel = new RequestsViewModel
                {
                    Travellers = new Travellers {
                        ID_Travellers = entity.travellers.ID_Travellers
                    },
                    Travels = new Travels {
                        ID_Travels = entity.travels.ID_Travels
                    },
                    ID_Requests = entity.ID_Requests
                };
                FillTravellersList(viewModel, TravellersList.ToList());
                FillTravelList(viewModel, TravelList.ToList());
                viewModel.Requests = await Manager.All();

                return(View("Index", viewModel));
            }
            catch (Exception ex)
            {
                return(BadRequest(ex.Message));
            }
        }
        public async Task <IActionResult> Index()
        {
            RequestsViewModel viewModel = new RequestsViewModel();
            var TravellersList          = await TravellersManager.All();

            var TravelList = await TravelsManager.All();

            FillTravellersList(viewModel, TravellersList.ToList());
            FillTravelList(viewModel, TravelList.ToList());
            viewModel.Requests = await Manager.All();

            return(View(viewModel));
        }