Take a look here http://code.google.com/appengine/docs/java/config/webxml.html#Security_and_Authentication
And then here (the first link will also point you here) http://code.google.com/appengine/docs/java/users/ Also read the overview http://code.google.com/appengine/docs/java/users/overview.html The overview explains how users are authenticated. Once a user is authenticated, UserService will know about the user. -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.