Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-08-20T10:59:18","request-id":"432d20e4-dee7-4fa2-9741-890ef69af0f0","client-request-id":"432d20e4-dee7-4fa2-9741-890ef69af0f0"}}}"