Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-08-16T08:52:31","request-id":"944d6826-7ed8-4b48-88f8-d525ef60cb0a","client-request-id":"944d6826-7ed8-4b48-88f8-d525ef60cb0a"}}}"