Updating TOS -- how do I require existing users to accept new TOS even when they're already logged in?

[RGJ (Richard - Communiteq)]

How to force existing users to accept ToS

To require acceptance of a terms-of-service, use a required custom user field. [This is a screenshot of a user profile page from a web application, likely for managing user fields. (Captioned by AI)] When defining a user field, you can select “Field Requirement” as “For all users”. When you do so, all new and existing users will be prompted to fill the custom field.