How do StackExchange sites associate user accounts and OpenID logins?
问题 I love StackExhchange / StackOverflow's approach to integrating OpenID. As I understand it, the process goes something like this: If a user signs up with an OpenID provider (i.e. Google), StackOverflow (or similar site) creates an account for the user and associates the OpenID with that account. An existing user can associate multiple OpenID accounts with his/her StackExchange account. I would love to emulate this behavior because I haven't seen it nearly as user-friendly on other sites. I