public void Withdrawal_Test()
        {
            var symbol  = "BTC";
            var address = "13VFW1D9ZPhXHLQGeZ4Vyf39LJpFbhopNR";
            var amount  = 0.01M;

            var withdrawal = _service.Withdrawal(symbol: symbol, address: address, amount: amount).Result;

            Assert.NotNull(withdrawal);
        }