Thread:Support/About EOL:Website-activerecord.attributes.open authentication.token/nb/reply

It's the name of an attribute on the open_authentication model (as are all of the records under activerecord.attributes). It would only be used in, say, a table or error message saying something is wrong with the entered value for that attribute. In this case, the token is a (random-looking) string used to authenticate against a key.

See the previous comment; I have the same reservations about this.