问题 I'm using Authlib, and attempting to get a refresh_token from a Hydra server. I have the following code: from authlib.client import OAuth2Session client_id = "my-client" client_secret = "client secret" token_url = "https://myhydraserver/token" scope = 'openid email profile offline' session = OAuth2Session(client_id, client_secret, scope=scope) token = session.fetch_access_token(token_url) print(token) This prints out {'access_token': 'the-token', 'expires_in': 3599, 'scope': '', 'token_type':