[xwiki-users] Adding a user to groups in Java

Hello, This has frustrated me to no end. I have a custom authenticator based on the http example (https://github.com/xwiki-contrib/sandbox/blob/master/authenticators/xwiki-a…) and it works well, except for one thing. In the linked code, you'll see a method syncUser that creates the user if necessary. I would like to modify this section to place the user in more than one global group. Here is my best attempt: // Right after the createUser() call... XWikiGroupService groupService = context.getWiki().getGroupService(context); groupService.addUserToGroup(validUserFullName, context.getDatabase(), "XWiki.SomeGroup", context); groupService.addUserToGroup(validUserFullName, context.getDatabase(), "XWiki.AnotherGroup", context); But this is just creating the users. If I log in as superadmin and check the groups, they are empty. Any ideas? Thanks!!