Update membership level with pmpro and wp-discourse

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this is the same function used by [Simon Cossar] (Profile - Simon_Cossar - Discourse Meta)team see this link

Managing Discourse group membership with WP Discourse

ihave used the same function please need help .i have posted code also see above message
This is my update membershiplevel code
function action_pmpro_after_change_membership_level( $level_id, $user_id, $cancel_level ) {

	$group_name = dcpmp_get_level_for_id( $level_id );
	if ( is_wp_error( $group_name ) ) {

		return null;
	}
	$groupname = DiscourseUtilities::get_discourse_user( $user_id, false );

	// Removes the user.
    $result = DiscourseUtilities::remove_user_from_discourse_group( $user_id, $groupname );
    if ( ! empty( $result->success ) ) {
       // Remove the membership level metadata key.
        delete_user_meta( $user_id, "dcpmp_group_{$groupname}" );
    }
    
    $result1 = DiscourseUtilities::add_user_to_discourse_group( $user_id, $group_name );

    if ( ! empty( $result1->success ) ) {

        // If the user has been added to the group, add a metadata key/value pair that can be used later.
        add_user_meta( $user_id, "dcpmp_group_{$group_name}", 1, true );
    }

return $result;
return $result1;

}
add_action( ‘pmpro_after_change_membership_level’, ‘action_pmpro_after_change_membership_level’, 10, 3 );