AWS SDK와 함께 ListContactLists사용

async fn show_lists(client: &Client) -> Result<(), Error> {
    let resp = client.list_contact_lists().send().await?;

    println!("Contact lists:");

    for list in resp.contact_lists() {
        println!("  {}", list.contact_list_name().unwrap_or_default());
    }

    Ok(())
}