Update app.py

app.py

@@ -32,7 +32,9 @@ with st.sidebar:
     st.markdown(
         "For more information about the models, see [here](https://platform.openai.com/docs/models/gpt-4-and-gpt-4-turbo)."
     )
-    OPENAI_API_KEY = st.text_input("API Key", type="password")
+    global OPENAI_API_KEY = st.text_input("API Key", type="password")
+
+
 
 # Instantiate your tools: Search engine tool duckduckgo-search
 search_tool = DuckDuckGoSearchRun()