diff --git a/twitch_backend.py b/twitch_backend.py
index 7b2b582..237d3b8 100644
--- a/twitch_backend.py
+++ b/twitch_backend.py
@@ -66,6 +66,8 @@ def on_disconnect(self, conn):
         super().on_disconnect(conn)
 
     def get_channel_id(self, user_name: str) -> str | None:
+        if not user_name:
+            return
         if user_name in self.cached_channels:
             return self.cached_channels[user_name]