User_Enumeration Plugins
Stock Plugins
Delegating Multi Plugin
This plugin delegates a PAS interface to some other acl_user folder, typically a "legacy" folder that implements some specific authentication functionality. For example, you can delegate the IAuthenticationPlugin interface to a legacy user folder via a Delegating Multi Plugin.
Search Principals Plugin
Plugin to delegate enumerateUsers and enumerateGroups requests to another PluggableAuthService
ZODB User Manager
ZODB-based user storage. Does authentication, enumeration and properties for users and stores its data in the ZODB.

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