The Security Log only records failed logon attempts. If you wish to review successful logon attempts, as well as other kinds of user activity, please consult the Activity Report and the Sys Admin Activity Log.
The Acitivity Report can be found in the /tpam interface under the Reports menu. This records user behavior such as authentications, requests, approvals, as well as system and account management.
The Sys Admin Activity Log can be found in the /admin interface under the Logs menu. This log records activity performed by Sys Admins, such as authentications, system configuration changes, updates and maintenance.