Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-09-16T08:55:42","request-id":"649d85e1-f1ed-4125-a838-c9f908fd00ae","client-request-id":"649d85e1-f1ed-4125-a838-c9f908fd00ae"}}}"