The documentation explains how to use REST API to perform common user operations, such as signing in users.
But it doesn't include, how to logout the current user. How it can be done?
Cloud Identity Platform is based on firebase auth solution. The authentication is managed user-side and not server side. (the access token and the refresh token are kept in the browser memory). Therefore, you can't logout a user with a Rest API call.
However, you can redirect your user on a page that clean their browser credential and then be disconnected.