I found this article describing how to override the user creation pipeline processor (
sitecore/pipelines/social.matchUser) for the Social Connected module. I have re-created this, and during debugging can see things like full name, email address and the created username.
How do I retrieve the other properties from the user's Facebook account? I have looked at the class
Sitecore.Social.Connector.Pipelines.MatchUser.SelectUserPipelineArgs, Sitecore.Social) but cannot see anything which is populated with data as I would expect.
This question is asking for a very similar thing.