I am using microsoft bot framework and trying to integrate it with external HTTP calls.

However when i invoke the BotWorker.say in the handler BotKitConversation's ask i start getting 

```
 (node:5711) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): TypeError: Cannot perform 'get' on a proxy that has been revoked

```

Below is my code

In my handler function's callback i get some values returned from external function.
Then i try to perform bot.say on the response returned and i recieve the above mentioned error.

```
 myDialog.ask('What would like to hear?', [
    {
        pattern: '.*',
        handler: async (response, convo, bot) => {
            await YoutubeHelper.getChannel(response, convo,async function(channels){
            console.log("value returned " + channels.length);
            try {
            await bot.say('Printing values'); //error comes here

            if (channels.length == 0) {

                await bot.say('No items found.');
              } else {
                await bot.say('This items\'s ID is %s. Its title is \'%s\', and ' ,
                            channels[0].id,
                            channels[0].snippet.title
                            );
              }
            }catch (err) {
                console.log('error occurred' , err);

            }
            });
        }
    }

],  {key: 'name'});
}

```

where myDialog is an object of BotkitConversation.

Below is the code for my external utility class

```
 /**
 * Lists the names and IDs of up to 10 files.
 *
 * 
 */

var {google} = require('googleapis');

var {myDialog} = require("./bot")

const getChannel = function getChannel(searchTerm, convo,callback) {

    var service = google.youtube({
      version : 'v3',
      auth : '<client id>'});

    service.search.list({
      part: 'id,snippet',
      q: searchTerm
    }, function(err, response) {
      if (err) {
        console.log('The API returned an error: ' + err);
        return;
      }
      var channels = response.data.items;
      if (channels.length == 0) {
        console.log('No items found.');
      } else {
        console.log('This items\'s ID is %s. Its title is \'%s\', and ' ,
                    channels[0].id,
                    channels[0].snippet.title
                    );
      }
      console.log(channels.length);
      callback(channels);
    });
    //

  }

  module.exports ={
    getChannel
}

```

I found [this](https://github.com/howdyai/botkit/blob/ee0a49fad2f6a9372e34c20945782e4b7ae5f929/packages/docs/advanced.md#what-causes-the-error-unhandledpromiserejectionwarning-typeerror-cannot-perform-get-on-a-proxy-that-has-been-revoked) document regarding the error . I am coding according to the guidelines mentioned.

Best Regards,

Saurav