Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-05-05T15:48:46","request-id":"5f0e4b90-48fe-4b5e-8fec-2c0cebd9bd1e","client-request-id":"5f0e4b90-48fe-4b5e-8fec-2c0cebd9bd1e"}}}"