Initial user after DB load

I have now got xwiki up and running with Postgresql (the binary version not svn). I followed instructions to change the database definitions from int2 to boolean for those fields that are really bits not ints which I found through google. I installed the sample data that comes with the ddl statements and then I came to log on. But the default id (which if I read the docs right is Admin pw admin) does not work. How do I find out which id is defined and what its password it, or reset the default admin id to something I know? Looking through the file xwiki.pg.dml.sql very near the end there are some test users, and one for Ludovic Dubost, but of course their passwords are encrypted (or at least obscured). But there is no Admin user. Regards David