public function updateSubscription($id, $status = INACTIVE)
 {
     global $categories, $cities;
     $user = R::load('subscriptions', $id);
     if (isset($user) && $user->id) {
         $user->is_confirmed = $status;
         R::store($user);
         if ($status) {
             $subscription_for = $user->category_id ? $categories[$user->category_id]['name'] : $cities[$user->city_id]['name'];
             $notif = new Notifications();
             $notif->updateSubscriptionMail($user->email, $id, $user->token, $subscription_for);
         }
         return $id;
     }
     return false;
 }