Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-09-04T21:43:31","request-id":"8990a132-7cbb-4bb2-ae4f-837c2827f6b3","client-request-id":"8990a132-7cbb-4bb2-ae4f-837c2827f6b3"}}}"