Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-08-27T15:10:03","request-id":"a32c1433-1f19-4480-be67-17e9824fc828","client-request-id":"a32c1433-1f19-4480-be67-17e9824fc828"}}}"