public async Task <IActionResult> Index(string sortColumn, string sortOrder, DateTime?startDate, DateTime?endDate)
        {
            var model = new AddUkprnToAllowedProvidersListViewModel
            {
                SortColumn       = sortColumn,
                SortOrder        = sortOrder,
                Ukprn            = null,
                StartDate        = startDate,
                EndDate          = endDate,
                AllowedProviders = await _applyApiClient.GetAllowedProvidersList(sortColumn, sortOrder)
            };

            return(View("~/Views/Roatp/AllowedProviders/Index.cshtml", model));
        }