title: Event to capture when a formsauthenticated user is un-authenticated
body: <p>I'm basically looking for the event that is the opposite of FormsAuthentication_OnAuthenticate.  I want to remove some values from the database when a user logs out.  I tried putting it into the Session_End event, but it seems that the user is already gone by the time this executes.</p>
  
  <p>Update:
  If I can't determine when a specific user is deauthenticated (ie, due to session timeout) then is there a way to get a list of all currently authenticated users?  If I could, then in the Session_End I could just remove the records from the DB that are not associated with a currently authenticated users.</p>