Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-08-19T09:46:35","request-id":"5463783d-789e-4826-8d8d-e877ef0bbf4f","client-request-id":"5463783d-789e-4826-8d8d-e877ef0bbf4f"}}}"