public static function run()
 {
     $action = array_key_exists('action', $_SESSION) ? $_SESSION['action'] : "";
     $arguments = array_key_exists('arguments', $_SESSION) ? $_SESSION['arguments'] : "";
     switch ($action) {
         case "create":
             self::newUser();
             break;
         case "show":
             if ($arguments == 'all') {
                 $_SESSION['users'] = UsersDB::getUsersBy();
                 $_SESSION['headertitle'] = "botspace users";
                 UserView::showAll();
             } else {
                 $users = UsersDB::getUsersBy('userId', $arguments);
                 $_SESSION['user'] = $users[0];
                 self::show();
             }
             break;
         case "update":
             echo "Update";
             self::updateUser();
             break;
         default:
     }
 }