Alexa ask a question and get response from external API

I have set up a simple intent

{
    "interactionModel": {
        "languageModel": {
            "invocationName": "viva bank",
            "intents": [
                ...builtin intents...
                {
                     "name": "ask",
                     "slots": [
                        {
                            "name": "question",
                            "type": "AMAZON.SearchQuery"
                        }
                    ],
                    "samples": [
                        "when {question}",
                        "how to {question}",
                        "what {question}"
                    ]
                }
            ],
            "types": []
        }
    }
}

But when I ask a question it gives me a generic error response like this:

Me: alexa ask viva bank when is the late fee charged

Alexa: Sorry, I don't know that.

Here is my lambda code, but I don't think it is getting that far.

'use strict';

const Alexa = require('ask-sdk-core');
var https = require('https');
var querystring = require('querystring');


const APP_ID = 'amzn1.ask.skill.1234'; 

const AskIntentHandler = {
  canHandle(handlerInput) {
    return !!handlerInput.requestEnvelope.request.intent.slots['question'].value;
  },
  handle(handlerInput) {
    var question = handlerInput.requestEnvelope.request.intent.slots['question'].value;
    console.log('mydata:', question);
    var responseString = '';
    const subscription_key = 'XXXX';

    var data = {
        simplequery: question,
        channel: 'Alexa'
    };
    var get_options = {
        headers: {'Subscription-Key': subscription_key }
    };

    https.get('https://fakeapi.com/' + querystring.stringify(data), get_options, (res) => {
      console.log('statusCode:', res.statusCode);
      console.log('headers:', res.headers);

      res.on('data', (d) => {
        responseString += d;
      });

      res.on('end', function(res) {
        var json_hash = JSON.parse(responseString);
        // grab the first answer returned as text and have Alexa read it
        const speechOutput = json_hash['results'][0]['content']['text'];
        console.log('==> Answering: ', speechOutput);
        // speak the output
        return handlerInput.responseBuilder.speak(speechOutput).getResponse();
      });
    }).on('error', (e) => {
      console.error(e);
      return handlerInput.responseBuilder.speak("I'm sorry I ran into an error").getResponse();
    });
  }

};

exports.handler = (event, context) => {
  const alexa = Alexa.handler(event, context);
  alexa.APP_ID = APP_ID;
  alexa.registerHandlers(AskIntentHandler);
  alexa.execute();
};

I'm really just looking to create a very simple pass through, where a question is asked to Alexa, and then I pipe that to an external API and have Alexa read the response.

from Alexa ask a question and get response from external API