add sign in message

app.py

@@ -59,6 +59,8 @@ def email_form():
     print(email)
     
     if st.button('submit') and email == "admin" and password == "admin":
+        st.session_state.messages.append(ChatMessage(role= "user", content="signing in"))
+        st.session_state.messages.append(ChatMessage(role= "assistant", content="Thanks for signing in. you can complete :smile:"))
         st.rerun()
 
 if "messages" not in st.session_state: