Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-04-09T04:32:05","request-id":"c70b9f35-0d5c-4d15-aca2-1e91e03f29df","client-request-id":"c70b9f35-0d5c-4d15-aca2-1e91e03f29df"}}}"