public async Task <ActionResult <InvoiceDto> > GenerateInvoice(GenerateInvoiceDto generateInvoiceDto)
 {
     if (generateInvoiceDto == null)
     {
         return(BadRequest("Invoice data must be set!"));
     }
     try
     {
         return(Ok(await _service.GenerateInvoiceAsync(generateInvoiceDto)));
     }
     catch (Exception e)
     {
         return(Conflict(e.Message));
     }
 }