suggestion

Hi 

Please check the following links. they might be of help to your issue. 

how can i get user login history details | IFS Community

Tracking User Account Login Events | IFS Community

Inquiry Regarding IFS User Activity Tracking | IFS Community

IFS History User Login log | IFS Community

Below query gives you last login and last logout details of any particular user. If you leave the user blank it will give all users details. You need to be app owner or have permissions to see all users details. 

you can create a quick report to run this as needed. 

SELECT t.identity,
 fnd_user_api.get_last_activity(t.identity) last_login
 , max(r.modified_date) last_logout
FROM FNDRR_USER_CLIENT_PROFILE  T, FNDRR_CLIENT_PROFILE_VALUE  r
WHERE t.identity not like 'IFS%'
and ordinal = 0
and fnd_user_api.Get_Active(identity) = 'TRUE'
and r.profile_id (+) = t.profile_id
and r.modified_date is not null
and t.Identity    LIKE UPPER(NVL('&UserID', '%'))
group by t.identity order by max(r.modified_date) desc;