What are the data types of social integration platforms (facebook, twitter, openid) ids?

Question

I am currently setting up a new user data model. Are the identifiers from facebook, twitter and openid numerical? What is the length?

This is what I still have:

users of the table http://ojs.at/users.png

Thanks for any collection.

Oliver

Answer 1

OpenIDs are strings (URLs). There is no such thing as an "OpenID".

As for twitter and facebook, they use OAuth and also use strings (access tokens).