let ln_addr = LightningAddress::from_str("[email protected]").unwrap();
let async_client = Builder::default().build_async().unwrap();

let res = async_client.make_request(url).await.unwrap();

if let LnUrlPayResponse(pay) = res {
    let msats = 1_000_000;
    let pay_result = async_client.get_invoice(&pay, msats, None).await.unwrap();

    let invoice = Bolt11Invoice::from_str(&pay_result.invoice()).unwrap();

    assert_eq!(invoice.amount_milli_satoshis(), Some(msats));
} else {
    panic!("Wrong response type");
}