public async Task GetOrdersThrows()
{
var user = new BinanceApiUser("api-key");
var symbol = Symbol.BTC_USDT;
await Assert.ThrowsAsync <ArgumentNullException>("user", () => _client.GetOrdersAsync(null, symbol));
await Assert.ThrowsAsync <ArgumentNullException>("symbol", () => _client.GetOrdersAsync(user, null));
}