Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-05-20T09:30:05","request-id":"b8aa5dab-0ddd-40fe-a73f-0b3881b11e67","client-request-id":"b8aa5dab-0ddd-40fe-a73f-0b3881b11e67"}}}"