function pastAppointment()
 {
     if (isset($_SESSION['authorization'])) {
         if ($_SESSION['authorization'] == 1) {
             $clients = Client::pastAppointment();
         } else {
             $clients = Client::pastDoctorAppointment($_SESSION['user_id']);
         }
         return view('clients.pastAppointment', ['clients' => $clients]);
     } else {
         //$_SESSION['mesaj'] = '<div class="form-signin" style="background-color:pink;"><center><p style="color:red;">Bu Sayfaya Girme Yetkiniz Yok .</p></center></div>';
         return Redirect::to('./sayfa-bulunamadi');
     }
 }