public function getUserIdFromSessionId($sessionId)
	{
		$database = \App::get('db');

		// get session timeout period
		$timeout = \App::get('config')->get('timeout');

		// load user from session table
		$sql = "SELECT userid 
				  FROM `#__session`
				  WHERE `session_id`=" . $database->quote($sessionId) . "
				  AND time + " . (int) $timeout . " <= NOW();";
				//  AND client_id = 0;";
		$database->setQuery($sql);
		return $database->loadResult();
	}