Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-07-20T07:28:31","request-id":"98b87d93-f47f-487e-982c-deb21495faa3","client-request-id":"98b87d93-f47f-487e-982c-deb21495faa3"}}}"