[xwiki-users] groovy question

Hi, This code from http://code.xwiki.org/xwiki/bin/view/Snippets/Create200DummyUsersSnippet for(user in users){ fullName = user.get(0) + user.get(1) udoc = xwiki.getDocument("XWiki."+fullName) uobj = udoc.getObject("XWiki.XWikiUsers", true) uobj.set("first_name", user.get(0)) uobj.set("last_name" , user.get(1)) print("* Registering *" + udoc.fullName + "*\n") udoc.save() gObj = allGroup.newObject('XWiki.XWikiGroups') gObj.set('member',udoc.fullName) } How to test if membership of group Xwiki.XWikiAllgroup already exists If I run the script twice I get two records in the group for the same person I would rather have the same behaviour as with getDocument; if not exists it creates a new one, otherwise a new version? Gerritjan