how to uncheck checkbox on profile page for unsubscirbed?

hi, it’s a great plugins 🙂

i’m using this plugins with theme my login.
how to put checkbox on profile page?
if user uncheck it, it will be unsubscribed, if people check it again, he will subscribed in mailing list.

Thanks 🙂

https://wordpress.org/plugins/mailchimp-for-wp/