Remove Xbox account?

I had a dispute with a person and I had granted access to my Xbox account, however, I believe after this dispute this person uses that I have heard that there's a setting with which I can log out on a device once it is this I would be very grateful if somebody would explain to me where I find them otherwise if there are not any suggestions for other possibilities

Change password and is good.

And then he would have to enter the password directly next time?

Yes