interface 2 session expirty redirect

streamlit/interface_2.py

@@ -1,5 +1,5 @@
 import json
-
+import security
 import boto3
 from langchain.prompts import PromptTemplate
 from langchain.embeddings.bedrock import BedrockEmbeddings
@@ -65,6 +65,9 @@ try:
     user_mail = st.session_state.user_info['mail']
 except KeyError as e:
     st.write("Session Expired.")
+    #st.write("Please sign-in to use this app.")
+    auth_url = security.get_auth_url(REDIRECT_URI)
+    st.markdown(f"<a href='{auth_url}' target='_self'>Sign In</a>", unsafe_allow_html=True)
     st.stop()
 
 # remove below try except statement if comparison with actual vales is not required