title: Chat Logs using Middleware
body: <p>I have included <strong>middleware</strong> to log the chats in firebase db. Now I am able to call the middleware once after the user sends some text to the bot then after bot sends the data to the user. In the previous version <em>bot framework v3</em> the <strong>activity</strong> payload will change the <strong><em>message.text and from and to</em></strong> as 
  <strong>user-bot/bot-user</strong>. But now in <strong><em>bot framework v4</em></strong> when the bot sends message/response to the user I can't find the data sent anywhere in the payload.
  Is there a way to save the data from bot-user. Please suggest me any ideas.</p>