Automatically disable notifications for users without the 'Niveau-3' tag

/**
 * Automatically disable notifications for users without the 'Niveau-3' tag.
 */
add_action( 'init', function() {
    // Check if the 'wpf_has_tag' function exists before proceeding
    if ( ! function_exists( 'wpf_has_tag' ) ) {
        return;
    }

    // Get all users
    $users = get_users();

    // Loop through each user
    foreach ( $users as $key => $user ) {
        // Check if the user does not have the 'Niveau-3' tag
        if ( ! wpf_has_tag( 'Niveau-3', $user->ID ) ) {
            // Update the user's meta to disable notifications
            update_user_meta( $user->ID, 'enable_notification', 'no' );
        }
    }
});