HTTP request : how to access retrieved data ?

Hello, 

I'm really new to Garmin App Development, I work on a personal project whom consist to make a simple Garmin Widget to show some retrieved data from an URL.

I get a HTTP response, and I'm wondering how could I access the text in the body section.

In my View.mc file :

class BusApp3View extends WatchUi.View {

    function initialize() {
        View.initialize();
    }

    function onLayout(dc as Dc) as Void {
        setLayout(Rez.Layouts.MainLayout(dc));
    }

    function onShow() as Void {
    }

    // Update the view
    function onUpdate(dc as Dc) as Void {


        var JT = new JsonTransaction();
        JT.makeRequest();


        View.onUpdate(dc);
    }

    function onHide() as Void {
    }

}


class JsonTransaction {
    // set up the response callback function
    function onReceive(responseCode as Number, data as Dictionary) as Void {
        if (responseCode == 200) {
                            // print success
        
        } else {
           var response_text = "Fail";                       // print response code
            
        }
    }

    function makeRequest() as Void {
        var url = "https://testgarminq.azurewebsites.net/";                         // set the url

        var params = {                                              // set the parameters
            
        };

        var options = {                                             // set the options
            :method => Communications.HTTP_REQUEST_METHOD_GET,      // set HTTP method
            :headers => {                                           // set headers
            "Content-Type" => Communications.REQUEST_CONTENT_TYPE_URL_ENCODED},
            // set response type
            :responseType => Communications.HTTP_RESPONSE_CONTENT_TYPE_URL_ENCODED
        };

        var responseCallback = method(:onReceive);                  // set responseCallback to
        // onReceive() method
        // Make the Communications.makeWebRequest() call
        
        Communications.makeWebRequest(url, params, options, method(:onReceive));
        
        
    }
}

Thanks for your help !