Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-07-31T17:47:00","request-id":"9e0f672c-22a7-4585-bead-b70f0398076a","client-request-id":"9e0f672c-22a7-4585-bead-b70f0398076a"}}}"