[xwiki-users] Manipulate users and groups via REST-API

Hello everyone, I need to manipulate user and groups (create/delete) via the REST-API. Has anyone done this before? Maybe he/she is willing to share their scripts? I appreciate any help. So if anyone can point me in the right direction this would be great. I started here: http://platform.xwiki.org/xwiki/bin/view/Features/XWikiRESTfulAPI#HXWikiREST... But I always get the result: The server has not found anything matching the request URI. Thank you for your help, Chris