cannot use for google login about oauth2-rs HOT 5 CLOSED

let mut authorize_url = config.authorize_url(String::new());
authorize_url.query_pairs_mut().append_pair("response_type", "code");

    let mut config = Oauth2Config::new(
        "YOUR_CLIENT_ID",
        "YOUR_CLIENT_SECRET",
        "https://accounts.google.com/o/oauth2/v2/auth",
        "https://www.googleapis.com/oauth2/v3/token"
    );

    // Point to your redirect URL
    config.redirect_url = "http://localhost:8080".to_string();

    config.scopes = Vec::new();
    config.scopes.push("https://www.googleapis.com/auth/calendar".to_string());

    let mut authorize_url = config.authorize_url(String::new());
    authorize_url.query_pairs_mut().append_pair("response_type", "code");

    let mut code = String::new();

    // This is my own-the-fly redirect URL server: Ignore this part if you've got this handled somewhere else
    let listener = TcpListener::bind("127.0.0.1:8080").unwrap();
    for stream in listener.incoming() {
        match stream {
            Ok(stream) => {
                let mut reader = BufReader::new(stream);

                let mut request_line = String::new();
                reader.read_line(&mut request_line).unwrap();

                let redirect_url = request_line.split_whitespace().nth(1).unwrap();
                let url = Url::parse(&("http://localhost".to_string() + redirect_url)).unwrap();

                let code_pair = url.query_pairs().find(|pair| {
                    let &(ref key, _) = pair;
                    key == "code"
                }).unwrap();

                let (_, value) = code_pair;
                code = value.into_owned();

                break;
            }
            Err(e) => {}
        }
    };

    let token = config.exchange_code(code).unwrap();