public async Task <IActionResult> OnPostCreateCustomer()
        {
            MemoryStream stream = new MemoryStream();

            Request.Body.CopyTo(stream);
            stream.Position = 0;
            using (StreamReader reader = new StreamReader(stream))
            {
                string requestBody = reader.ReadToEnd();
                if (requestBody.Length > 0)
                {
                    var obj = JsonConvert.DeserializeObject <CustomerDTO>(requestBody);
                    if (obj != null)
                    {
                        await _service.CreateCustomerAsync(obj);
                    }
                }
            }
            return(new JsonResult("Thành công"));
        }