I have a Facebook desktop application and am using the [Graph API](http://en.wikipedia.org/wiki/Facebook_Platform#Graph_API).
I am able to get the access token, but after that is done - I don't know how to get the user's ID.

My flow is like this: 

1. I send the user to *<https://graph.facebook.com/oauth/authorize>* with all required extended permissions.
2. In my redirect page I get the code from Facebook.
3. Then I perform a HTTP request to *graph.facebook.com/oauth/access\_token* with my API key and I get the access token in the response.

From that point on I can't get the user ID.

How can this problem be solved?