one is a development site on a local machine, and the other is a private site ?? so that won’t be possible.
In your code I see that user_login is still being used :
example:
row 375
wp_send_json(self::format_message($row->user_login, $row->message, $row->post_date, $row->id, $row->website, $row->ip, self::widget_instance($id)));
row389
$return .= self::format_message($row->user_login, $row->message, $row->post_date, $row->id, $row->website, $row->ip, $options);
rgds,
W