User last logged in time / user login audit

Oracle database Enterprise Edition 19.18 on Oracle Liunx 7

RAC= 4 nodes

I am trying to figure out when certain users last logged in . We have an automated process (cyberark) that changes password everyday, so last login changes everyday.

select USERNAME,LAST_LOGIN,PASSWORD_CHANGE_DATE from dba_users where username in('LHARRIS')

USERNAME  LAST_LOGIN   PASSWORD_CHANGE_DATE

CHARRIS  7/19/2023 9:08 7/19/2023 9:08:34 PM

Question 1. Which table should I query to find last login for some users(employee users) ?

Question 2. how could create a simple audit to login some users' log in and log out timing? Examples would be appreciated.