diff --git a/run.py b/run.py
index f0c9763..df026d8 100644
--- a/run.py
+++ b/run.py
@@ -35,7 +35,7 @@ async def arguments(args):
         "surname": args.user_name,
         "admin": True
     }
-    users = await list_users()
+    users = await list_users() or []
     label = any(u.admin for u in users)
     if not label:
         await create_user(UserCreate(**admin_user))