private async Task <bool> HandleServiceCompleted(string message)
{
var receivedShipServiceObject = JsonSerializer.Deserialize <ShipServiceCompletedMessageEvent>(message);
var invoice = await _invoiceRepository.GetLastInvoiceForCustomer(receivedShipServiceObject.CustomerId);
await _invoiceRepository.AddShipServiceLineAsync(invoice.Id.ToString(), receivedShipServiceObject.ShipId, receivedShipServiceObject.ServiceId);
return(true);
}