Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-04-30T21:34:06","request-id":"aa62ead2-b73b-433a-8049-3bba6a6067bd","client-request-id":"aa62ead2-b73b-433a-8049-3bba6a6067bd"}}}"