OpenID: How to best associated Multiple OpenID Accounts to one User?

Question

I am a newbie in openID. I spend a lot of time thinking what the best-practices are to give the user the choice, to login with various OpenID enabled accounts.

(I have

Answer 1

OpenID is an authentication mechanism, not a profile storage mechanism. You should still have a unique identifier for the person on your site, and should maintain a record which stores the OpenID in relation to that unique identifier in the same way you would store a password related to that unique identifier.