Volley getRequest to node server does not hit onResponse method

I am working on a get request implementation using Volley in an android application that communicates with a node backend server to pull user details for a profile page.

I have a method using Volley which sends the get request to the node backend. I can see that I get back the result I am looking for for the user details on the node end, but then somehow, the onResponse method is never called and my response is null. I think I am missing something on either how I send the response or on the Volley side but can't seem to fix it. The onErrorResponse codeblock is also never hit, I just get a null return. I will post the volley and node code below:

Volley

public Map<String, String> makeVolleyGetRequest(Context context, String url, String token) {
    final Context applicationContext = context;

    String getUrl = url + "/token=" + token;

    JsonObjectRequest request = new JsonObjectRequest(Request.Method.GET, getUrl, null,
            new Response.Listener<JSONObject>() {
                @Override
                public void onResponse(JSONObject response) {
                    Log.d("Response", response.toString());
                    try {
                        responseEntries.put("email", response.getString("email"));
                        responseEntries.put("firstName", response.getString("firstName"));
                        responseEntries.put("lastName", response.getString("lastName"));
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                }
            }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            Log.d("Error: ", error.getMessage());
        }
    });

    RequestQueue requestQueue = Volley.newRequestQueue(applicationContext);
    request.setRetryPolicy(new DefaultRetryPolicy(0, -1, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
    requestQueue.add(request);

    return responseEntries;
}

Node server code:

app.get('/getUserDetails/token=:token', function (req, res) {

    var url = req.url;
    var token = url.split("=");
    var parsedToken = token[1];

    console.log("Request token is " + parsedToken);
    retrieveUser.retrieveUser(parsedToken, function (found) {
        console.log("found is " + found);
        res.json(found);
         res.setHeader('Content-Type', 'application/json');
         res.send(JSON.stringify(found));
        console.log("response sent");
    });
});

The node side calls a method called retrieveUser, which I can see is returning the correct user from the token provided, so I do not believe there is any issue there.

Any help is greatly appreciated!

via A.Dow