Update

app-backend/config/response.config.js

@@ -0,0 +1,9 @@
+function sendMessage (res, successCode, data, token=null) {
+  res.status(200).json({ status: 'success', successCode: successCode, token: token, data: data });
+}
+
+function sendError (res, statusCode, errorCode, reason, token=null) {
+  res.status(statusCode).json({ status: 'error', errorCode: errorCode, data: { token: token, reason: reason }});
+}
+
+module.exports = { sendMessage, sendError };