Update app.py

app.py

@@ -4,6 +4,7 @@ from streamlit_option_menu import option_menu
 import os
 import plotly.express as px
 from io import StringIO
+from langchain_google_genai import ChatGoogleGenerativeAI
 from langchain.schema import HumanMessage, SystemMessage, AIMessage
 from langchain.chat_models import AzureChatOpenAI, ChatOpenAI
 from langchain.memory import ConversationBufferWindowMemory