This function retrieves subscriber information from the MailChimp API for a requested email or user ID.
This function is only available if the MailChimp Integration extension is installed and activated.
(string) (required) The process to execute (subscribe|update|unsubscribe|delete).
(integer|string) (required) List member email or ID.
Introduced in version 2.0.1
wpmem_mc_process_user() is located in /includes/api.php.