Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-08-13T05:21:12","request-id":"7a4ecdc9-30fe-4178-8488-647885fe53eb","client-request-id":"7a4ecdc9-30fe-4178-8488-647885fe53eb"}}}"