quick fix

app.py

@@ -162,6 +162,15 @@ class PollQuestions(BaseModel):  # type: ignore[misc]
 poll_questions = PollQuestions.from_json_file("templates.json")
 
 
+def logout(request: gr.Request):
+    cookies = ["access-token-unsecure", "access-token"]
+    for cookie in cookies:
+        if request.cookies.get(cookie):
+            request.cookies.clear()
+            del request.cookies[cookie]
+            LOG.warning(f"Deleted cookie for {request.request}")
+
+
 def reset_textbox():
     return (None,) * 3
 
@@ -234,7 +243,6 @@ class ChatSession(BaseModel):
                 Current date: {current_date}
                 """
         else:
-            knowledge_cutoff = "Early 2023"
             system_msg = (
                 f"""Knowledge cutoff: {knowledge_cutoff}
                 Current date: {current_date}
@@ -398,6 +406,9 @@ async def respond(
         return user_msg, memory_buffer
 
     try:
+        if request.username is None:
+            logout(request)
+            raise RuntimeError(f"Username not found for request: {request.request}")
         if state is None:
             if chatbot_mode == ChatbotMode.DEBATE_PARTNER:
                 new_session = ChatSession.new(
@@ -599,7 +610,7 @@ with gr.Blocks(
     with gr.Tab("Chatbot"):
         with gr.Row():
             chatbot_mode = gr.Radio(
-                label="Mode",
+                label="Mode (Please use Debate Parter for AI Dialogue Assignments)",
                 choices=config.chatbot_modes,
                 value=ChatbotMode.DEFAULT,
             )