Finish DB docs for Rackspace
diff --git a/rackspace/db/v1/users/delegate.go b/rackspace/db/v1/users/delegate.go
index 0e724f5..0bb4c8c 100644
--- a/rackspace/db/v1/users/delegate.go
+++ b/rackspace/db/v1/users/delegate.go
@@ -6,14 +6,17 @@
 	"github.com/rackspace/gophercloud/pagination"
 )
 
+// Create will create a new database user for the specified database instance.
 func Create(client *gophercloud.ServiceClient, instanceID string, opts os.CreateOptsBuilder) os.CreateResult {
 	return os.Create(client, instanceID, opts)
 }
 
+// List will list all available users for a specified database instance.
 func List(client *gophercloud.ServiceClient, instanceID string) pagination.Pager {
 	return os.List(client, instanceID)
 }
 
+// Delete will permanently remove a user from a specified database instance.
 func Delete(client *gophercloud.ServiceClient, instanceID, userName string) os.DeleteResult {
 	return os.Delete(client, instanceID, userName)
 }