Twitter Log In Only

[ChatterBox]

I have created a new forum that ties directly into my Twitter community and I would like all new forum members to be required to join using the Twitter handler only and force the new members to use their Twitter usernames, Twitter avatars, and Twitter header image so that the other members can identify who they are communicating with in the forum and be confident they are actually talking to that same person from Twitter. 

Is it possible to set it up so that the Twitter handler is the only one new members can register with and force new registrations to automatically pull their Twitter username and their avatar and header images into the forum profile?

I'd also like their # of following and # of followers to show in their member info if possible.

Thanks!