public static function init()
 {
     self::$api_key = get_option(self::API_KEY, '');
     self::$workspace_id = get_option(self::WORKSPACE_ID, '');
     if (is_admin()) {
         // register settings
         self::register_settings();
         if (self::$api_key != '') {
             // Meta boxes
             add_action('admin_init', array(__CLASS__, 'register_meta_boxes'));
         }
     }
 }