Update app.py

app.py

@@ -298,7 +298,7 @@ def streamlit_app(db):
     
     # Cache the chat messages
     @st.cache_resource
-    def get_messages(db):
+    def get_messages(_db):
         if "messages" not in st.session_state:
             st.session_state.messages = []
         return st.session_state.messages