the user the invoice belongs to; staff; or a request made with the correct

    access code.

    '''

    invoice_id = int(invoice_id)

    inv = rego.Invoice.objects.get(pk=invoice_id)

    current_invoice = InvoiceController(inv)

    if not current_invoice.can_view(

            user=request.user,

            access_code=access_code,

        raise Http404()

    data = {

        "invoice": current_invoice.invoice,

    }

    return render(request, "registrasion/invoice.html", data)

@login_required

def manual_payment(request, invoice_id):

    ''' Allows staff to make manual payments or refunds on an invoice.'''