public async Task UserStreamCloseThrows()
{
var user = new BinanceApiUser("api-key");
const string listenKey = "listen-key";
await Assert.ThrowsAsync <ArgumentNullException>("user", () => _client.UserStreamCloseAsync((IBinanceApiUser)null, listenKey));
await Assert.ThrowsAsync <ArgumentNullException>("apiKey", () => _client.UserStreamCloseAsync((string)null, listenKey));
await Assert.ThrowsAsync <ArgumentNullException>("listenKey", () => _client.UserStreamCloseAsync(user, null));
await Assert.ThrowsAsync <ArgumentNullException>("listenKey", () => _client.UserStreamCloseAsync(user, string.Empty));
}