how do i reset game share?

That person would have to change their home Xbox back to their own console or someone else's to stop sharing your games. There is no way to manually remove them.

ok thanks for letting me know

set your xbox to your own home xbox also change your password and require signin

That person would have to change their home Xbox back to their own console or someone else's to stop sharing your games. There is no way to manually remove them.

If you want to gameshare your account with another xbox. You need to go to that xbox and sign into your account and press the Xbox Guide button scroll to the right to System and Click Settings. From there go down to Personalizations > My Home Xbox. Make
that Xbox you want to game share with your home xbox.

Just warning if your Internet goes down you will not be able to play any games on the Xbox One S cause it requires Internet to validate your license. You will still be able to play on the other xbox.

Click this for the link to how to game share.

Quick version.

1. Press the Xbox button to open the guide.
2. Select System > Settings > Personalization, and then select My home Xbox.
3. Do either of the following:
   • Select Make this my home Xbox to designate the console as your home Xbox.