document twig functions on impersonation

Author: 94noni

security/impersonating_user.rst

@@ -62,14 +62,18 @@ listener:
             ;
         };
 
-To switch to another user, add a query string with the ``_switch_user``
+To switch to another user, leverage the add a query string with the ``_switch_user``
 parameter and the username (or whatever field our user provider uses to load users)
 as the value to the current URL:
 
 .. code-block:: text
 
     http://example.com/somewhere?_switch_user=thomas
 
+.. tip::
+
+    You can leverage the Twig function ``impersonation_path('thomas')``
+
 .. tip::
 
     Instead of adding a ``_switch_user`` query string parameter, you can pass
@@ -128,6 +132,10 @@ To switch back to the original user, use the special ``_exit`` username:
 
     http://example.com/somewhere?_switch_user=_exit
 
+.. tip::
+
+    You can leverage the Twig function ``impersonation_exit_path('/somewhere')``
+
 This feature is only available to users with a special role called ``ROLE_ALLOWED_TO_SWITCH``.
 Using :ref:`role_hierarchy <security-role-hierarchy>` is a great way to give this
 role to the users that need it.