public function hook()
    {
        wp_enqueue_script('jquery');

        add_action('wp_head', array($this, 'printToken'));
        add_action('admin_head', array($this, 'printToken'));

        add_action('wp_footer', array($this, 'printAjaxHeader'));
        add_action('admin_footer', array($this, 'printAjaxHeader'));
    }