Update app.py

app.py

@@ -2,6 +2,12 @@ import streamlit as st
 import sys
 import os
 
+if "logged_in" not in st.session_state:
+    st.session_state.logged_in = False
+
+if not st.session_state.logged_in:
+    st.warning("Please login first")
+    st.stop()
 # ---------- ADD EXTERNAL PATHS ----------
 sys.path.append(os.path.abspath("../model"))
 sys.path.append(os.path.abspath("../prompt"))