DOCSP-19331 show user output (#6075)

source/reference/method/db.getUser.txt

@@ -127,10 +127,24 @@ Required Access
 Example
 -------
 
-The following sequence of operations returns information about the
-``appClient`` user on the ``accounts`` database:
+The following operations return information about an example
+``appClient`` user in an ``accounts`` database:
 
 .. code-block:: javascript
 
    use accounts
    db.getUser("appClient")
+
+Example output:
+
+.. code-block:: javascript
+   :copyable: false
+
+   {
+      _id: 'accounts.appClient',
+      userId: UUID("1c2fc1bf-c4dc-4a22-8b04-3971349ce0dc"),
+      user: 'appClient',
+      db: 'accounts',
+      roles: [],
+      mechanisms: [ 'SCRAM-SHA-1', 'SCRAM-SHA-256' ]
+   }