It's very easy to get authentication running on app engine for google accounts. I'm looking for the simplest way to only allow a specific set of accounts access to the page, more generally the resources (servlets, static files, etc). I would be perfectly happy with a hardcoded list of email names in web.xml. Or something similar in the java code. Flexility is not the priority. The context is a GWT+GAE application that only 3 users ever should have access to.
Thanks, Matyas