Automatically add WordPress site to your iControlWP control panel from ManageWP (or other)

functions.php

<?php
/**
 * You may automatically add any WordPress site to your iControlWP account by using the "code run"
 * or "code snippets" feature in ManageWP.
 *
 * Please follow these steps:
 *
 * 1) Install and activate the iControlWP plugin on your WordPress site.
 * 2) Grab your "AUTHENTICATION_KEY" from your iControlWP account:
 *      - https://app.icontrolwp.com/profile/preferences
 * 3) Enter your AUTHENTICATION_KEY and registered iControlWP email address below where indicated.
 *      - ensure to keep the single quotes in-place.
 * 4) Check the $path variable. This assumes your WP Content and plugins folders are "normal" and unchanged
 *      from defaults.
 * 5) Copy and paste all the code into the "code snippets" tool. You don't need these comments, and
 * 	  please ensure the file starts with "<?php"
 */
$path = path_join( ABSPATH, 'wp-content/plugins/worpit-admin-dashboard-plugin/auto_add.php' );
$res = file_put_contents(
	$path,
	wp_json_encode( [
		'api-key' => 'AUTHENTICATION_KEY',
		'email'   => 'REGISTERED_EMAIL_ADDRESS',
	] )
);
if ( $res !== false && $res > 0 ) {
	echo 'Auto-Add site configuration created. Site will be automatically added to your iControlWP account shortly.';
}
else {
	echo 'Failed to create Auto-Add site configuration. You may not have file system permissions, or your directory structure is not as expected';
}