Log out on other devices

Dear Pokemon Go Community,

Hopefully this is the right place to ask. I was wondering how I can revoke access and log myself out on other devices (except my own) without having access to the other devices?
I’ve changed my Gmail password, entered a 2-step verification progress (with my own number) and removed accounts from accessing the account.

However, I was wondering if thats all I needed to do or if there is another method? Does above solve the issue that no one else is able to log in?

Hope to hear the right answer soon!

Best,
Grotesque