Sync MailChimp Subscription Status with Intercom

import_mailchimp_to_intercom.js

var Intercom = require('intercom.io');

var options = {
  apiKey: "intercomapikey",
  appId: "intercomappid"
};

var intercom = new Intercom(options);

var MailChimpAPI = require('./node_modules/mailchimp-api/mailchimp');
var apiKey = 'mailchimpkey';
var mc = new MailChimpAPI.Mailchimp(apiKey);
var list_id = 'mailchimplistid';

// you have to manually increment start page 0++ until memberData results are null
// also you should import status: "cleaned" and start at page 0
mc.lists.members({id: list_id, status: "unsubscribed", opts: {limit: 100, start:0}}, function(memberData) {
  memberData.data.forEach(function(member) {
    if (member.status != "subscribed") {
      intercom.updateUser({
        email: member.email,
        unsubscribed_from_emails: true
      }, function (err, res) {
        if (err) {
          console.log(err);
        } else {
          console.log(res.email, 'unsubscribed');
        }
      });
    }
  })
});