the api key provided is linked to datacenter 'us5\"
request.post({
url: 'https://usXX.api.mailchimp.com/3.0/lists/xxxxxxx/members',
headers: {
'Content-Type': 'application/json',
'Authorization': 'Basic xxxxxxxxxxxxxxxxxxxxxxxxx-usXX'
},
form: JSON.stringify({
email_address: req.body.email,
status: 'subscribed',
interests: { 'xxxxxxx': true } // Interest Group
})
}, function(err, httpResponse, body) {
res.send(body);
});