Add google.auth.crypt (#6)

diff --git a/docs/reference/google.auth.crypt.rst b/docs/reference/google.auth.crypt.rst
new file mode 100644
index 0000000..7f8c0f8
--- /dev/null
+++ b/docs/reference/google.auth.crypt.rst
@@ -0,0 +1,7 @@
+google.auth.crypt module
+========================
+
+.. automodule:: google.auth.crypt
+    :members:
+    :undoc-members:
+    :show-inheritance:
diff --git a/docs/reference/google.auth.rst b/docs/reference/google.auth.rst
index 0533449..4c39cb9 100644
--- a/docs/reference/google.auth.rst
+++ b/docs/reference/google.auth.rst
@@ -6,3 +6,10 @@
     :undoc-members:
     :show-inheritance:
 
+Submodules
+----------
+
+.. toctree::
+
+   google.auth.crypt
+
diff --git a/docs/reference/google.oauth2.rst b/docs/reference/google.oauth2.rst
new file mode 100644
index 0000000..fb67d27
--- /dev/null
+++ b/docs/reference/google.oauth2.rst
@@ -0,0 +1,8 @@
+google.oauth2 package
+=====================
+
+.. automodule:: google.oauth2
+    :members:
+    :undoc-members:
+    :show-inheritance:
+