public async void CanWithdrawCryptoCurrency()
{
var withdrawal = new NewCryptoCurrencyWithdrawal(CurrencyCode.XBT, 10, "18e143cdVYYkQesFsycgSoDEQAQQ2p9uWC");
var withdrawalResult = await _client.WithdrawCryptoCurrencyAsync(_walletId, withdrawal);
}