[web2py] Authenticate a user against Twitter and them create a user in web2py's db?

[Stodge]

I have the simple authentication example working from
http://dougwarren.org/2010/06/oauth-and-web2py-part-1/. Actually I
think it's more like authorisation as it gives you access to Twitter
data as well as authenticating the user. Anyway. Are there any
tutorials for taking this a step further and creating users in the
web2py database when a user authenticates against Twitter? Ideally,
I'd like to try to store some Twitter user data in the db as well.
Thanks