Update app.py

app.py

@@ -29,6 +29,7 @@ pc = Pinecone(api_key=PINECONE_API_KEY)
 
 # Fetch LangSmith API key from Streamlit secrets
 os.environ["LANGCHAIN_API_KEY"] = st.secrets["LANGCHAIN_API_KEY"]
+os.environ["LANGCHAIN_API_KEY"] = str(os.environ["LANGCHAIN_API_KEY"])
 os.environ["LANGCHAIN_TRACING_V2"] = "true"
 os.environ["LANGCHAIN_ENDPOINT"] = "https://api.smith.langchain.com"
 os.environ["LANGCHAIN_PROJECT"] = "Inkqa"