...
#[tokio::main]
async fn main() {
    let store = Store::new();
    let store_filter = warp::any().map(move || store.clone());
...
    let get_questions = warp::get()
        .and(warp::path("questions"))
        .and(warp::path::end())
        .and(warp::query())
        .and(store_filter)
        .and_then(get_questions);
        .recover(return_error);
...
}
...