public async Task <ActionResult <InvoiceApiModel> > Post([FromBody] InvoiceApiModel input,
                                                                 CancellationToken ct = default)
        {
            try
            {
                if (input == null)
                {
                    return(BadRequest());
                }

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