added HF_Login

app.py

@@ -7,6 +7,8 @@ print(f"Loading FAISS index from: {embedding_path}")
 if not os.path.exists(embedding_path):
     print("File not found!")
 
+HF_KEY=os.getenv('Gated_Repo')
+
 import spaces
 import sys
 import time
@@ -26,6 +28,9 @@ from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain_community.vectorstores.utils import DistanceStrategy
 from sentence_transformers import SentenceTransformer
 from transformers import AutoTokenizer, AutoModelForCausalLM, BitsAndBytesConfig, TextIteratorStreamer, pipeline
+from huggingface_hub import login
+
+login(token=HF_KEY)
 
 class BSIChatbot:
     def __init__(self, model_paths: Dict[str, str], docs_path: str):