mask auction bidder name in auction history tab

<?php
/**
 * Mask Auction Bidder Name in Auction History Tab - solution with custom template (obsolete)
 *
 * please use this code snippet instead https://pastebin.com/r5P47mHL
 *
 */

if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly

global $woocommerce, $post, $product;

$heading = esc_html( apply_filters('woocommerce_auction_history_heading', __( 'Auction History', 'wc_simple_auctions' ) ) );
$datetimeformat = get_option('date_format').' '.get_option('time_format');

?>

<h2><?php echo $heading; ?></h2>

<?php if(($product->is_closed() === TRUE ) and ($product->is_started() === TRUE )) : ?>

    <p><?php _e('Auction has finished', 'wc_simple_auctions') ?></p>
    <?php if ($product->get_auction_fail_reason() == '1'){
         _e('Auction failed because there were no bids', 'wc_simple_auctions');
    } elseif($product->get_auction_fail_reason() == '2'){
        _e('Auction failed because item did not make it to reserve price', 'wc_simple_auctions');
    }

    if($product->get_auction_closed() == '3'){?>
        <p><?php _e('Product sold for buy now price', 'wc_simple_auctions') ?>: <span><?php echo wc_price($product->get_regular_price()) ?></span></p>
    <?php }elseif($product->get_auction_current_bider()){ ?>
        <p><?php _e('Highest bidder was', 'wc_simple_auctions') ?>: <span><?php echo get_userdata($product->get_auction_current_bider())->display_name ?></span></p>
    <?php } ?>

<?php endif; ?>

<table id="auction-history-table-<?php echo $product->get_id(); ?>" class="auction-history-table">
    <?php

        $auction_history = apply_filters('woocommerce__auction_history_data', $product->auction_history());

        if ( !empty($auction_history) ): ?>

        <thead>
            <tr>
                <th><?php _e('Date', 'wc_simple_auctions') ?></th>
                <th><?php _e('Bid', 'wc_simple_auctions') ?></th>
                <th><?php _e('User', 'wc_simple_auctions') ?></th>
                <th><?php _e('Auto', 'wc_simple_auctions') ?></th>
            </tr>
        </thead>
        <tbody>
        <?php if ($product->is_sealed()){

                echo "<tr>";
                   echo "<td colspan='4'  class='sealed'>".__('This auction is sealed. Upon auction finish auction history and winner will be available to the public.', 'wc_simple_auctions')."</td>";
                echo "</tr>";

        } else {
            foreach ($auction_history as $history_value) {
                echo "<tr>";
                echo "<td class='date'>".mysql2date($datetimeformat ,$history_value->date)."</td>";
                echo "<td class='bid'>".wc_price($history_value->bid)."</td>";
                echo "<td class='username'>".preg_replace("/(?!^).(?!$)/", "*", get_userdata($history_value->userid)->display_name)."</td>";
                if ($history_value->proxy == 1)
                    echo " <td class='proxy'>".__('Auto', 'wc_simple_auctions')."</td>";
                else
                    echo " <td class='proxy'></td>";
                echo "</tr>";
            }
        }?>
        </tbody>

    <?php endif;?>

    <tr class="start">
        <?php
        if ($product->is_started() === TRUE ){
            echo '<td class="date">'.mysql2date($datetimeformat ,$product->get_auction_start_time()).'</td>';
            echo '<td colspan="3" class="started">';
            echo apply_filters('auction_history_started_text', __( 'Auction started', 'wc_simple_auctions' ), $product);
            echo '</td>';

        } else {
                echo '<td  class="date">'.mysql2date($datetimeformat ,$product->get_auction_start_time()).'</td>';
                echo '<td colspan="3"  class="starting">';
                echo apply_filters('auction_history_starting_text', __( 'Auction starting', 'wc_simple_auctions' ), $product);
                echo '</td>' ;
        }
        ?>
    </tr>
</table>