public IActionResult GetInvoicesBySalesRepId(int salesRepId) { var employee = _userRepository.GetEmployeeById(salesRepId); if (employee == null) { return(NotFound("No Employees Match This Sales Rep Id")); } var invoicesBySalesRep = _repository.GetInvoicesBySalesRepId(salesRepId); var noInvoicesBySalesRep = !invoicesBySalesRep.Any(); if (noInvoicesBySalesRep) { return(NotFound("There are currently no invoices for this sales rep.")); } return(Ok(invoicesBySalesRep)); }