[Piwik] How to get token and siteid

<?php
//Snippet call e.g.: [[!PiwikTracker? &id=`7`]]

//Sources:
//http://piwik.org
//http://piwik.org/docs/tracking-api/
//http://developer.piwik.org/api-reference/PHP-Piwik-Tracker

//Piwik Tracking API init:
require_once 'PiwikTracker.php';
PiwikTracker::$URL = 'http://YOUR-PIWIK-SITE.ltd';
$piwikTracker = new PiwikTracker($idSite=$id);
$piwikTracker->setTokenAuth('xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx');

//IP:
$piwikTracker->setIP($_SERVER['REMOTE_ADDR']);

//FullUrl:
$resID = $modx->resource->get('id');
$fullUrl = $modx->makeUrl($resID, '', '', 'full');
$piwikTracker->setUrl($fullUrl);

//PageTitle:
$PageTitle = $modx->resource->get('pagetitle');
$piwikTracker->doTrackPageView($PageTitle);

return;