how to delete guest account on tablet?

[AC Question]

I now noticed a new face icon for user accounts. Mine, a and now a guest accout. I do not want a Guest account created on my device. Never had it before and all was fine. How do i/we disable and/or delete this account? Seems like a major new security flaw to activate these by default with no clear easy way for the Owner to control. How to delete this Guest accout. (Using a Samsung tablet.)