gistfile1.php

<?php
add_filter( 'optinmonster_output', 'tgm_om_hide_optins' );
function tgm_om_hide_optins( $optins ) {
 
    // Return an empty array if no user is logged in. Change this to your logic for determining where customers come from.
    if ( ! is_user_logged_in() ) {
        return array();
    }
    
    // Return the potentially modified optins.
    return $optins;
 
}