/**
* Remove session data for user \a $userID.
* @todo should use eZSession api (needs to be created) so
* callbacks (like preference / basket..) is cleared as well.
*
* @params int $userID
*/
static function removeSessionData($userID)
{
eZUser::clearSessionCache();
eZSession::getHandlerInstance()->deleteByUserIDs(array($userID));
}
