mailchimpbackend.js

const axios = require('axios'); //remember to install the axios npm

var url = 'https://{SERVER}.api.mailchimp.com/3.0/lists/{LIST ID}/members';
var api_key = '{API KEY HERE}';

export function createSub(fname, lname, email) {
	return axios({
        url: url,
        method: 'post',
        headers: {
            'Authorization': 'Basic ' + api_key,
            'Content-Type': 'application/json'
        },
		data: JSON.stringify({
			email_address: email,
			status: 'subscribed',
			merge_fields: {
				FNAME: fname,
				LNAME: lname
			}
		})
    })
    .then( (response) => {
		return {status: response.status, response: response.data};
    })
    .catch( (error) => {
		return {status: error.response.status, response: error.response.data};
    });
}