Hi @sparsons,
A warm welcome here in the Roku Community!
We appreciate you for reaching out about this. Please be aware that we don't have any option to remove a user from the account once the user is already logged in. It needs to be signed out manually from that phone.
For additional assistance, we would recommend contacting our Support team about this. Choose the option for Roku Smart Home.
Let us know if there's anything else we can do to further assist you.
Thanks,
Rey
ERey.
Roku Community Moderator