private static async IAsyncEnumerable <IResponseMessage> HandleMessage(IncomingMessage message, IValidHandle matchedHandle)
{
yield return(message.ReplyToChannel($"Hey @{message.Username}, how you doing?"));
await Task.Delay(TimeSpan.FromSeconds(1));
yield return(message.IndicateTypingOnDirectMessage());
await Task.Delay(TimeSpan.FromSeconds(5));
yield return(message.ReplyDirectlyToUser("I know where you live..."));
}