Set up a connection to Mailchimp

API guide link: https://developer.mailchimp.com/documentation/mailchimp/reference/overview/

Link to authentication page: https://developer.mailchimp.com/documentation/mailchimp/guides/get-started-with-mailchimp-api-3/#authentication

1. Name: Required: Name the connection.
2. Connection type: Required: The form will automatically select MailChimp.
3. Data Center: This value can be found out after logging into the account. Extract the value from the URL. For example, if the URL is https://us20.admin.mailchimp.com/account/profile/post, then "us20" is the data center.
4. Borrow concurrency from (optional): Select another connection from the list....

5. Concurrency level (optional): Up to 25 allowed....
6. Click Save & Authorize. The following page displays:
7. Username: Enter the username of the existing MailChimp account.
8. Password: Enter the password. The password is created on account is setup.
9. Click Log In to establish the connection.