[Dovecot] Preforming an action/trigger after a user successfully authenticates

Hi -

I have searched the docs for v1.0 RC7, but cannot find what I'm looking for.

What I'm ultimately wanting to do is have Dovecot preform some action, or a trigger, when the user is successfully authenticated. Even more specifically, I'd like to run another SQL query to record a date/time for last authenticated login.

Short from running a script during logrotate, or constantly tailing the log, is there any mechanism in Dovecot that would allow me to do this? Again, all I'm looking to do is to record the last date/time that someone successfully logged in, into a MySQL database.

Thanks! -dant