The `BrowsableAPIRenderer` generates a form to test POST/PUT/... actions
and fill the FK fields with unfiltered data. This issue has been spoted
on visio and fixed https://github.com/suitenumerique/meet/pull/508
This allows to use `people` as an identity provider using
OIDC and local users.
This commit is partial, because it does not manage a way to
create "local" users and the login page is the admin one, which
can't be used for non staff users or login with email.