RGW's ``user:subuser`` tuple maps to the ``tenant:user`` tuple expected by Swift.
-.. important:: RGW's Swift authentication service only supports
- built-in Swift authentication (``-V 1.0``) at this point. There is
- currently no way to make RGW authenticate users via OpenStack
- Identity Service (Keystone).
+.. note:: RGW's Swift authentication service only supports built-in Swift
+ authentication (``-V 1.0``). To make RGW authenticate users via OpenStack
+ Identity Service (Keystone), see below.
Integrating with OpenStack Keystone
===================================