Hook / event for manipulate $data in outputSSO

Recently I had to hack this in: we wanted to use a custom field (`$currentUser->displayName`) as the `name` passed in the `outputSSO` `$data`.

Either a hook to manipulate that data, or an event (`vanillaforums.outputSSO` or something) to manipulate this data would be great. Of course if its an event, you'd have to pass `$data` by reference so it can be changed.
