Error 212

mailchimp.js

const mcapi = require('mailchimp-api');

const mailchimp = new mcapi.Mailchimp(process.env.mailchimpApiKey);
const mailchimpListId = process.env.mailchimpListId;

var subscribe = {
    double_optin: false,
    email: { email: 'test@mediocre.com' },
    id: mailchimpListId
};

mailchimp.lists.subscribe(subscribe, (member) => {
    var unsubscribe = {
        email: { leid: member.leid },
        id: mailchimpListId
    };

    mailchimp.lists.unsubscribe(unsubscribe, () => {
        var resubscribe = {
            email: { leid: member.leid },
            id: mailchimpListId
        };

        mailchimp.lists.subscribe(subscribe, () => {
            console.log('success');
        }, err => {
            return console.error('resubscribe error', err);
        });
    }, err => {
        return console.error('unsubscribe error', err);
    });
}, err => {
    return console.error('subscribe error', err);
});

/*
resubscribe error { status: 'error',
  code: 212,
  name: 'List_InvalidUnsubMember',
  error: 'test@mediocre.com has unsubscribed, and cannot be resubscribed by you. To prevent false spam complaints, they\'ll need to resubscribe of their own free will.' }
*/