Update app.py

app.py

@@ -1,5 +1,10 @@
 import streamlit as st
+import os
 from transformers import AutoModelForCausalLM, AutoTokenizer
+from huggingface_hub import login
+
+login(token=os.environ['HF_TOKEN'])
+
 import torch
 
 class VietnameseChatbot: