Add support for exchanging tokens in Keycloak

Change-Id: Ie5d5bee36ece52aefd035013e8f946b1160e8c58
(cherry picked from commit c0ba66642718e492979b43bad2b2fc1ba9d7a217)
diff --git a/doc/source/user/index.rst b/doc/source/user/index.rst
new file mode 100644
index 0000000..9ed7b12
--- /dev/null
+++ b/doc/source/user/index.rst
@@ -0,0 +1,8 @@
+##########
+User Guide
+##########
+
+.. toctree::
+   :maxdepth: 2
+
+   auth