Learndash - programatically course enroll with wp registration

gistfile1.txt

// copy this code in the child theme functions.php or a specific code plugin like FluentSnippets

add_action( 'user_register', 'auto_enroll_user_to_course', 10, 1 );
function auto_enroll_user_to_course( $user_id ) {
    if ( ! is_wp_error( $user_id ) ) {
        $course_ids = array( 131 ); // Course ID, or ID's user separate comme if you want to add multiple id.
        
        if ( !is_array( $course_ids ) ) {
            $course_ids = array( $course_ids ); 
        }
        
        foreach ( $course_ids as $course_id ) {
            ld_update_course_access( $user_id, $course_id, false );
        }
    }
}