This extension is incompatible with MediaWiki 1.39 or any later release! You are advised against using this extension on a live site. MediaWiki developers are invited to pledge their efforts to updating this extension to make it compatible with MediaWiki 1.43 by replacing the {{Incompatible }} template with {{Incompatible |version=1.39|pledge=~~~~}}.

This extension is currently not actively maintained! Although it may still work, any bug reports or feature requests will more than likely be ignored.

MediaWiki extensions manual

ListDuplicateUsers Release status: unmaintainedCategory:Unmaintained extensions
Implementation	Special page Category:Special page extensions
Description	Creates a special page that lists duplicate user accounts.
Author(s)	David Wong (daw5423talk)
Latest version	1.0.0 (2020-05-01)
MediaWiki	1.26+Category:Extensions with manual MediaWiki version
License	GNU General Public License 2.0 or later
Download	GitHub: project page git repository URL [help ] commit history Note: No localisation updates are provided by translatewiki.net . Category:Extensions in GitHub version control
Added rights listduplicateusers Category:Extensions which add rights

The ListDuplicateUsers extension creates a special page that lists duplicate user accounts, which are determined by email address.

Installation

• Download and place the file(s) in a directory called ListDuplicateUsers in your extensions/ folder.
• Add the following code at the bottom of your LocalSettings.php file:

  wfLoadExtension( 'ListDuplicateUsers' );
  

• Configure as required.
• Done – Navigate to Special:Version on your wiki to verify that the extension is successfully installed.

Configuration

Append these lines to the end of the "LocalSettings.php" file, possibly located at "/opt/htdocs/mediawiki/LocalSettings.php":

$wgGroupPermissions['listduplicateusers']['listduplicateusers'] = true;
$wgGroupPermissions['bureaucrat']['listduplicateusers'] = true;