"Content of question".to_string(),
        Some(vec!["faq".to_string()]),
    );
 
    match question.id.0.parse::<i32>() {
        Err(_) => {
            Err(warp::reject::custom(InvalidId))
        },
        Ok(_) => {
            Ok(warp::reply::json(
                &question
            ))
        }
    }
}
...