someone forgot to add parameters

celery/security/__init__.py

@@ -83,4 +83,4 @@ def setup_security(allowed_serializers=None, key=None, cert=None, store=None,
 
     with open(key) as kf:
         with open(cert) as cf:
-            register_auth(kf.read(), cf.read(), store)
+            register_auth(kf.read(), cf.read(), store, digest, serializer)