Adding documentation
diff --git a/openstack/db/v1/users/doc.go b/openstack/db/v1/users/doc.go
index 82abcb9..cf07832 100644
--- a/openstack/db/v1/users/doc.go
+++ b/openstack/db/v1/users/doc.go
@@ -1 +1,3 @@
+// Package users provides information and interaction with the user API
+// resource in the OpenStack Database service.
 package users