public ActionResult Start(string letter = "A")
 {
     if (new Auth((BorrowerWithUser)Session["User"]).HasAdminPermission() && LetterLists.LetterList.Contains(letter))
     {
         return(View(new LettersAndBorrowers(LetterLists.LetterList, BorrowerService.GetBorrowersByLetter(letter))));
     }
     return(Redirect("/Error/Code/403"));
 }