Update app.py

app.py

@@ -1,6 +1,7 @@
 import streamlit as st
 import requests
 import datetime
+import os
 
 from langchain.llms import HuggingFaceHub
 
@@ -16,6 +17,7 @@ from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain.document_loaders import RecursiveUrlLoader
 from langchain.chains import RetrievalQA
 
+os.environ["HUGGINGFACEHUB_API_TOKEN"] = "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"
 embedding = HuggingFaceHubEmbeddings()
 
 url = "https://us.community.samsung.com/t5/Get-Help/ct-p/get-help?page=1&tab=recent_topics"