chargebee in webapi

ChargebeeController.cs

[RoutePrefix("Chargebee")]
public class ChargebeeController : ApiController
{
    private readonly ILoggingService _loggingService;
    private readonly TicketCountRepository _ticketCountRepository;
    private readonly IBusinessRepository _businessRepository;
    private readonly IBus _bus;

        public ChargebeeController(ILoggingService loggingService, TicketCountRepository ticketCountRepository, IBusinessRepository businessRepository,
            IBus bus)
        {
            _loggingService = loggingService;
            _ticketCountRepository = ticketCountRepository;
            _businessRepository = businessRepository;
            _bus = bus;
            _loggingService.Info<ChargebeeController>("ChargebeeController() ctor");
        }

        [System.Web.Http.Route("Callback")]
        public async Task<HttpResponseMessage> Callback()
        {
            _loggingService.Info<ChargebeeController>("Chargebee/Callback()");

            // The body can only be parsed once an another handler or module has already done so,
            // so reset the stream to the beginning
            var stream = await Request.Content.ReadAsStreamAsync();
            stream.Seek(0, System.IO.SeekOrigin.Begin);

            // convert the stream to a chargebee event
            var chargebeeEvent = new ChargeBee.Models.Event(stream);

            // Choose the right event to handle
            _loggingService.Info<ChargebeeController>("Handeling {chargebeeEventType}", chargebeeEvent.EventType);

            switch (chargebeeEvent.EventType)
            {
                case EventTypeEnum.PendingInvoiceCreated:
                    PendingInvoiceCreated(chargebeeEvent);
                    break;
                case EventTypeEnum.SubscriptionCreated:
                    SubscriptionCreated(chargebeeEvent);
                    break;
                default:
                    break;
            }

            return Request.CreateResponse(HttpStatusCode.Accepted, true);
        }

        private void SubscriptionCreated(Event data)
        {
            var eventContent = data.Content;

            Subscription subscription = eventContent.Subscription;

            Customer customer = eventContent.Customer;

            _loggingService.Info<ChargebeeController>("A new subscription was created in chargebee");
        }

        private void PendingInvoiceCreated(ChargeBee.Models.Event data)
        {
            // * find back the BUSINESS ID
            var business = _businessRepository.GetByChargeBeeIdentifier(data.Content.Invoice.CustomerId);

            if (business == null)
            {
                _loggingService.Error<ChargebeeController>("business not found vor chargebee customerId {chargebeeCustomerId}", data.Content.Invoice.CustomerId);
                return;
            }

            // todo prepare invoice lines
            _bus.SendCommand(new PendingChargebeeInvoiceCreated
            {
                ChargebeeInvoiceId = data.Content.Invoice.Id,
                InvoiceLines = new List<PendingChargebeeInvoiceCreated.InvoiceLineItem>(),
                SubscriptionId = data.Content.Invoice.SubscriptionId,
                CustomerId = data.Content.Invoice.CustomerId,
                BusinessId = business.BusinessId
            });
            
        }

        
    }