Update main.py

main.py

@@ -4,6 +4,8 @@ from starlette.routing import Route
 from starlette.middleware import Middleware
 from starlette.middleware.cors import CORSMiddleware
 from starlette.middleware.base import BaseHTTPMiddleware
+from starlette.exceptions import HTTPException
+
 from gensim.models import KeyedVectors
 """Prompt templates for LLM"""
 from env import LLM_API_KEY