public function __construct()
 {
     parent::__construct();
     if (!$this->ion_auth->logged_in()) {
         redirect('auth/login');
     }
     $this->output->set_header('Last-Modified: ' . gmdate("D, d M Y H:i:s") . ' GMT');
     $this->output->set_header('Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0');
     $this->output->set_header('Pragma: no-cache');
     $this->output->set_header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
 }
 public function __construct()
 {
     parent::__construct();
 }