With the recent Heartbleed vulnerability, I think it would be a good forward-looking feature to be able to reset/clear all user login tokens, and maybe some other breach recovery-oriented operations.
There doesn’t need to be any actual UI for this, just a TUI.
(This post was inspired by Github resetting all login tokens after they upgraded their OpenSSL versions.)
(edit) I think this accomplishes it:
UPDATE users SET auth_token = NULL -- WHERE all rows ;