public function __construct() {
		$this->defined_tokens = apply_filters(
			'automator_pre_defined_tokens',
			array(
				'site_name',
				'user_id',
				'user_username',
				'user_firstname',
				'user_lastname',
				'user_email',
				'user_displayname',
				'reset_pass_link',
				'admin_email',
				'site_url',
				'recipe_name',
				'current_date',
				'current_time',
			)
		);
	}