Because it allows validating with a list of audiences.

Make it work with pyjwt.

This method is useful for public endpoints that need
to work for anonymous user, but can be enhanced when
an authenticated user is know.

A typical use case is a "add to cart" enpoint that can
work for anonymous users, but can be enhanced by
binding the cart to a known customer when the authenticated
user is known.

…aining

The unit tests were broken for non-functional reasons (interaction with
the mock) and is easier to implement as integration test.