Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-04-21T14:34:39","request-id":"561ebfa8-03b5-448e-932f-dd5c36c1f928","client-request-id":"561ebfa8-03b5-448e-932f-dd5c36c1f928"}}}"