public async Task <IActionResult> Post([FromBody] InvoiceLineViewModel input, CancellationToken ct = default(CancellationToken))
 {
     try
     {
         if (input == null)
         {
             return(BadRequest());
         }
         return(Ok(await _chinookSupervisor.AddInvoiceLineAsync(input, ct)));
     }
     catch (Exception ex)
     {
         return(StatusCode(500, ex));
     }
 }
        public async Task<ActionResult<InvoiceLineResponse>> Post([FromBody] InvoiceLineResponse input,
            CancellationToken ct = default)
        {
            try
            {
                if (input == null)
                    return BadRequest();

                return StatusCode(201, await _chinookSupervisor.AddInvoiceLineAsync(input, ct));
            }
            catch (Exception ex)
            {
                return StatusCode(500, ex);
            }
        }