Cyberfr connexion à Graph Microsoft : ok string(237) "{"error":{"code":"InvalidAuthenticationToken","message":"Access token is empty.","innerError":{"date":"2026-07-15T21:45:19","request-id":"c5c6fe81-c134-4a2a-84dc-93c2f28b8fda","client-request-id":"c5c6fe81-c134-4a2a-84dc-93c2f28b8fda"}}}"