Google AppEngine with Silverlight client using Google Login

I'd like to use Google AppEngine with Silverlight client. I'm hoping to use the Google login authentication mechanism开发者_开发问答 within the Silverlight client. Is this possible? Does anyone have any example sites where a RIA client used in conjunction with Google AppEngine security?

Thanks.

You need to have your users log in via a regular HTML page, then send them to the page with the silverlight client. Anything else would be encouraging users to enter their credentials into a third-party site, which is a Bad Idea.

I really don't believe that is true, meaning if you have an installed application Google has a login that allows you to enter username and pwd in your application. I believe silverlight is closer to windows application. Here is the login mechanism

http://code.google.com/apis/accounts/docs/AuthForInstalledApps.html