SNMP OID to view active users on RouterOS Version 3.x

Hi all, i wonder if anybody can tell me the SNMP OID to view the active users, on version 2.x i was using 1.3.6.1.4.1.9.9.150.1.1.1.0 and work fine, but in version 3.x it always show 0 value.

Thank you!