the login, a one-time-use link is emailed to the user, and they can simply
open that link in their browser.
-It is enabled by default, but can be turned off if you want to only use
-some other form of authentication, such as [[passwordauth]] or [[openid]].
+It is (indirectly) enabled by default, but can be turned off if you want to
+only use some other form of authentication, such as [[passwordauth]] or
+[[openid]].
Users who have logged in using emailauth will have their email address used as
their username. In places where the username is displayed, like the