Sending personal responses through FB Messenger bot

settle-felony-charges.js

app.post('/webhook/', receiveMessage);

function receiveMessage(req, res, next){
  var message_instances = req.body.entry[0].messaging;
  message_instances.forEach(function(instance){
    var sender = instance.sender.id;
    if(instance.message && instance.message.text) {
      fetchUserProfileAndReply(sender, conf.PROFILE_TOKEN);
    }
  });
  res.sendStatus(200);
}

function fetchUserProfileAndReply(sender, token){
  request({
    url: 'https://graph.facebook.com/v2.6/' + sender + '?access_token=' + token,
    method: 'GET'
  }, function (error, response) {
    if(error) return;

    response = JSON.parse(response.body);
    msg_text = "Hey " + response.first_name + ", happy to have you here."
    sendMessage(sender, msg_text);
    sendMessage(sender, "I am test bot written to save my creator from felony charges");
  });
}

function sendMessage(receiver, data){
  var payload = {};
  payload = data;

  request({
    url: conf.FB_MESSAGE_URL,
    method: 'POST',
    qs: {
      access_token: conf.PROFILE_TOKEN
    },
    json: {
      recipient: {id: receiver},
      message: payload
    }
  }, function (error, response) {
    if(error) console.log(error);
  });
}