Questions about Force user authentication and api : validate

Prerequisite: I turned on the Force user authorization permission setting.
I use the correct token to access the api/authentication/validate interface, and the return value valid is false.

How can I verify the correctness of the token through an interface, under the premise that the setting is turned on?

Ideally it should return as

    "valid": true

Can you try in Postman with Basic auth and give token in username field?