help logging other devices out my account?

[tropic girder]

So i let my friend log into my account a couple months ago for gamesharing and now hes started to say racial slurs to people on my account and i dont really know how to log him out, ive changed my password but it says itll take 30 days to replace security info so i dont know if itll log him out immediately or i have to wait 30 days because hes messaging alot of people and i dont want my account to get banned