reset sql counter every time user logged in

dear Savers I'm in middle of missy code , I need to expire the session every time the user is logged in , I do all my best but I found that best way is to set max-all-session for the session and that will exipre the session every time and regenerate new session id , now my question is how to reset the sql counter every time the user is logged in sqlcounter sql_session_timeout_never {       sql_module_instance = sql       counter_name = Max-All-Session-Time       check_name = Max-All-Session       reply_name = Session-Timeout       key = User-Name       reset = never       query = "\             SELECT IFNULL(SUM(AcctSessionTime),0) \             FROM radacct \             WHERE UserName='%{${key}}'" } I must set reset = ? thanks , all