Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-04-07T07:18:20","request-id":"917e33dc-87a7-44a8-a84e-ea0991194006","client-request-id":"917e33dc-87a7-44a8-a84e-ea0991194006"}}}"