public Response Buy(Invoice invoice)
{
Response response = new Response();
if (invoice.Email == null && invoice.InvoiceName == null)
{
response.Success = false;
response.Message = "ERROR: invoice must have email or name";
return(response);
}
carsRepository.AddInvoice(invoice);
response.Success = true;
response.Message = "invoice added";
return(response);
}