public IActionResult VerifyCarrier(long ixCarrier, string sCarrier)
        {
            string validationResponse = "";

            if (!_carriersService.VerifyCarrierUnique(ixCarrier, sCarrier))
            {
                validationResponse = $"Carrier {sCarrier} already exists.";
            }
            if (validationResponse != "")
            {
                return(Json(validationResponse));
            }
            else
            {
                return(Json(true));
            }
        }