public ActionResult SelectInvoices(string errorMessage)
 {
     try
     {
         int ContIndex = Convert.ToInt32(User.Identity.Name);
         var model = new SelectInvoicesModel
         {
             Client = engineService.GetClientDetails(ContIndex),
             Invoices = engineService.GetInvoiceDetails(ContIndex),
             ErrorMessage = errorMessage
         };
         return View(model);
     }
     catch(Exception ex)
     {
         Console.WriteLine(ex);
         return RedirectToAction("Error");
     }
 }