Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-04-28T20:25:23","request-id":"1ee78468-a5e2-4a05-ab61-3d74e57dc182","client-request-id":"1ee78468-a5e2-4a05-ab61-3d74e57dc182"}}}"