Shibbing XWiki

Hi there, I've been looking at "shibbing" XWiki - i.e. turning it into a Shibboleth compatible Service Provider. I've done that bit, using the Guanxi system: http://guanxi.uhi.ac.uk/xwiki The goal of "shibbing" xwiki is to allow users from certain named institutions to automatically login to xwiki and have an account created on the fly, based on their attributes. What this involves is two steps: 1) Protect an XWiki Shibboleth Login page with Guanxi - I've done that 2) Based on the SAML Assertion from their Identity Provider, authenticate them - I've done that too (almost!) 3) Create them an account on the fly once authentication succeeds. The information required to create an account (username etc.) would come from their Identity Provider in SAML Attribute Assertions. I've still to do this. What I'm wondering is there a way to create users on the fly without having an XWikiContext? What I'd like to do is create a new class that can create XWiki users directly. The goal of Guanxi + XWiki is an XWiki at, say UHI Millennium Institute that will allow users at the University of Leeds or Oxford who are software developers to login automatically, using their Leeds or Oxford username, with their accounts being created on the fly, so they don't need to register. I've done about 80% of the work, I just need a cleaner way of creating users without having to use the XWikiContext and request parameter maps etc. Hope you can help, thanks, Alistair