Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-04-06T19:16:25","request-id":"f20d8350-d443-4f40-ad77-0aa2c81cde44","client-request-id":"f20d8350-d443-4f40-ad77-0aa2c81cde44"}}}"