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!