Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-08-30T16:57:18","request-id":"a18fd5c6-d398-4a54-ad30-cdddc5568a42","client-request-id":"a18fd5c6-d398-4a54-ad30-cdddc5568a42"}}}"