We don’t log out / expire all sessions in case of a password change, but the previous sessions will no longer renew.
Practically this means that you should log out and log in in your browser after changing the password, that will make all previous sessions as “non renewing”. Sessions right now are valid for 3 days, once those sessions expire that user will be prompted to sign in again (the session will not renew).
That said, please do not share your user login with anyone. You can grant access to other users and you can revoke those rights any time. If possible please also enable two factor authentication.
If you have any questions just let us know! 