Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-05-16T16:04:46","request-id":"cfb78a7f-d951-4a87-889b-6d0b3edbc10a","client-request-id":"cfb78a7f-d951-4a87-889b-6d0b3edbc10a"}}}"