//параметры для метода - из query string
 public IActionResult AddRequestHandler(int requestId, int employeeId)
 {
     if (requestId <= 0 || employeeId <= 0)
     {
         return(BadRequest());
     }
     requestService.AddRequestHandler(requestId, employeeId);
     return(RedirectToAction("GetMachines", "Machine"));
 }