// GET: Suppliers/Details/5
        public async Task <IActionResult> Details(int?id)
        {
            if (id == null)
            {
                return(NotFound());
            }

            var supplier = await _invoicesRepository.GetSupplierAsync(id.Value);

            if (supplier == null)
            {
                return(NotFound());
            }

            return(View(supplier));
        }