[Typo3-UG Australia] How to unset session data

[Shuja ul Hasan]

Hi,

I want to unset the session data or user session.
I have made few changes in t3lib.class.userauth.php class, while keeping the 
user session data, but I noticed that user session data is stored in typo3 
database [fe_session_data]. The field type of content is BLOB, which store 
every information user has entered during the session. I want this 
information to be erased as soon as user logged out from typo3 front end.
 
I know that typo3 take care of this data and wipe it off when 'it' feel 
necessory. I want to force typo3 to clean it when the user logged out.


Thank You.

Shuja