Log out everyone

Hey,

I gave out my login info to an ex friend to access the xfinity hotspots around. I keep getting texts showing a security code when I’m not trying to login.
I don’t want anyone but me using my account anymore.
Is there a way to log out everyone that is connected to xfinity hotspots using my information?
I changed my password but I’m still connected on my tv so obviously it didn’t kick me off.

Thanks