Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-04-07T21:12:16","request-id":"b1f909e6-bcd3-4fd0-afcb-27f7704d14dc","client-request-id":"b1f909e6-bcd3-4fd0-afcb-27f7704d14dc"}}}"