Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-08-04T21:45:08","request-id":"b855ca76-c483-4d4c-8e08-dec0bb06ad90","client-request-id":"b855ca76-c483-4d4c-8e08-dec0bb06ad90"}}}"