How do I log in if my OpenID is not available, or maybe even no longer exists? Can I restore my lost account, or do I need to start over?

See also:

- http://meta.stackexchange.com/questions/18232/how-can-one-link-merge-combine-associate-two-stack-overflow-accounts-users-anon

- http://meta.stackexchange.com/questions/95358/i-lost-control-of-my-account-before-registering-is-it-lost-forever