subscribe a user to a particular list when he registers as a WP user

Following this article https://kb.mailpoet.com/article/195-add-subscribers-through-your-own-form-or-plugin#addSubscriber I am trying to add a user to a list, but it goes the the default wordpress user’s list only.

Here is the code used in our functions.php in child theme, using the “user_register” hook.

We are using mailpoet 3.18.1 on a premium license (I don’t know if I can write here or I nedd to open a ticket, in case let me know).

///////////////////////////////////////////////////////////////////////////////

add_action( ‘user_register’, ‘es_registration_save’, 10, 1 );

function es_registration_save( $user_id ) {

$Email = $_POST[‘user_email’];

$firstName = $_POST[‘cimy_uef_wp_FIRSTNAME’];

$lastName = $_POST[‘cimy_uef_wp_LASTNAME’];

$Nation = $_POST[‘cimy_uef_NATION’];

$newsletter = $_POST[‘cimy_uef_NEWSLETTER’];

if (!isset($newsletter) || empty($newsletter)){

// return “error”;

} else {

$subscriber_data = array(

’email’ => sanitize_text_field($Email),

‘first_name’ => sanitize_text_field($firstName),

‘last_name’ => sanitize_text_field($lastName)

);

if ($Nation == ‘Italy’) {

$lists = array(11);

} else {

$lists = array(10);

}

try {

$subscriber = \MailPoet\API\API::MP(‘v1’)->addSubscriber($subscriber_data, $lists, $options);

} catch(Exception $exception) {

// return $exception->getMessage();

}

}

}

//////////////////////////////////////////////////////////////////////////////

The result is that the user is not added to one of the two lists (id 10 or 11) but only to the default WordPress users only.

Flavio