This Event allows to provide authentication on a per request basis by using signatures or tokens instead of the default DokuWiki login or cookies.
Since 2010-01-29, there is an AFTER event available.
The global $AUTH_ACL is not set up when this event is triggered.
$data is an associative array containing user, password, sticky and silent login parameters.
If the Event handler does not $event→preventDefault() those parameters are passed to auth_login().
The following plugins are known to handle this event and their source code may be a good start for understanding and implementing a handler yourself.