DOCSP-18271: Add list users page

Author: npentrel

source/core/security-users.txt

@@ -142,3 +142,4 @@ general, clients should connect to the sharded cluster through the
 
    /tutorial/create-users
    /tutorial/authenticate-a-user
+   /tutorial/list-users

source/tutorial/list-users.txt

@@ -0,0 +1,42 @@
+.. _list-users:
+
+==========
+List Users
+==========
+
+.. default-domain:: mongodb
+
+.. contents:: On this page
+   :local:
+   :backlinks: none
+   :depth: 3
+   :class: singlecol
+
+To list all users, use :binary:`~bin.mongosh` to query the
+:doc:`system.users </reference/system-users-collection>` collection:
+
+.. code-block:: sh
+
+   use admin
+   db.system.users.find()
+
+.. important::
+
+   Do not modify the :doc:`system.users
+   </reference/system-users-collection>` collection directly. To manage
+   users, use the designated :ref:`user management commands
+   <user-management-commands>`.
+
+To list all users of a :doc:`sharded cluster </sharding>` that were
+created through a :binary:`~bin.mongos`, connect to a
+:binary:`~bin.mongos` and run the preceding command. MongoDB stores
+users that are created through a :binary:`~bin.mongos` in the ``admin``
+database of the :term:`config servers <config server>`.
+
+To list all :ref:`shard local users
+<shard-local-users>`, connect to the respective shard directly and run
+the preceding command. MongoDB stores *shard local* users in the
+``admin`` database of the shard itself. These *shard local* users are
+independent from the users added to the sharded cluster through a
+:binary:`~bin.mongos`. *Shard local* users are local to the shard and
+are inaccessible to :binary:`~bin.mongos`.