Update app.py

app.py

@@ -5,6 +5,7 @@ import PyPDF2
 import gradio as gr
 from langchain.prompts import PromptTemplate
 from langchain.chains.summarize import load_summarize_chain
+from huggingface_hub import login
 from pathlib import Path
 from langchain_huggingface import ChatHuggingFace, HuggingFaceEndpoint
 from transformers import AutoTokenizer, AutoModelForSequenceClassification