From 999e4688d4ef8317f13d606ee9c1f505e7effad5 Mon Sep 17 00:00:00 2001
From: Tim Abbott <tabbott@mit.edu>
Date: Mon, 25 Jan 2016 18:11:31 -0800
Subject: [PATCH] Fix missing return None in
 ZulipRemoteUserBackend.authenticate.

---
 zproject/backends.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/zproject/backends.py b/zproject/backends.py
index e50362ffb8..08833ae9c4 100644
--- a/zproject/backends.py
+++ b/zproject/backends.py
@@ -115,7 +115,7 @@ class ZulipRemoteUserBackend(RemoteUserBackend):
 
     def authenticate(self, remote_user):
         if not remote_user:
-            return
+            return None
 
         email = remote_user_to_email(remote_user)