protected async override Task <object> OnPerform()
        {
            var deleteContract = JsonConvert.SerializeObject(_addPrepayContract);
            var content        = new StringContent(deleteContract, Encoding.UTF8, ApplicationJSON);
            var response       = await _fuelPumpRestClient.AddPrepay(content);

            var data = await response.Content.ReadAsStringAsync();

            switch (response.StatusCode)
            {
            case HttpStatusCode.OK:
                var contract = new DeSerializer().MapSale(data);
                return(new Mapper().MapSale(contract));

            default:
                return(await HandleExceptions(response));
            }
        }