Node.js Lambda Function "response is invalid" Amazon Alexa

UPDATE: I had a mistake on my http request endpoint. I had not set the appropriate authentication options so that fixed a lot of errors possibly this specific one.

My question is similar to one here:

Node.js Lambda function returns "The response is invalid" back to Alexa Service Simulator from REST call

However the solution to that question does not solve my problem. So I make an http request call to an xsjs service in Hana cloud. I am getting the 'response is invalid' error message. I can't see why. Here is my function:

 // Create a web request and handle the response.
function httpGet(query, callback) {

    console.log("/n QUERY: "+ query);

    var host = 'datacloudyd070518trial.hanatrial.ondemand.com'; 
    var path = '/LocationInformation/getLocationInfo.xsjs?location='; 
    var hostname = 'https://' + host + path + query; 


    var auth = 'user1:D1anafer'; 

    var req = http.request({'hostname': hostname,
                            'auth': auth
                        }, (res) => {

    var body = '';

        res.on('data', (d) => {
            body += JSON.stringify(d);
        });

        res.on('end', function () {
            callback(body);
        }); 

    }); 


    req.end();

    req.on('error', (e) => {
        console.error(e);
    }); 


}

And the function that calls it:

'getNewsIntent': function () {

    //self = this; 

    httpGet(location, function (response) {

        // Parse the response into a JSON object ready to be formatted.
        //var output = JSON.parse(response); 
        //output = output['change']; 
        var output = response; 

        var cardTitle = location; 
        var cardContent = output; 

        alexa.emit(':tellWithCard', output, cardTitle, cardContent);

    }); 

}, 

Thank You -Diana