Without having a look at the SK articles i would do following using mgmt_cli
Having a look at the user's sessions and some info.
(echo "UID STATE MODE LOCKS CHANGES"; mgmt_cli -r true show sessions details-level full -f json | jq -r '.objects[] | select(.["user-name"] == "usename") | "\(.uid) \(.state) \(.["connection-mode"]) \((.locks|length)) \((.changes|length))"') | column -t
to delete all sessions of a user
mgmt_cli -r true show sessions details-level full -f json | jq -r '.objects[] | select(.["user-name"] == "username") | .uid' | xargs -I {} mgmt_cli -r true disconnect uid "{}"
But since the GUI does nothing other than make such API calls, I doubt that it will work for you.
and now to something completely different - CCVS, CCAS, CCTE, CCCS, CCSM elite