Update app.py

app.py

@@ -54,7 +54,8 @@ if st.button("Send WhatsApp Message"):
     else:
         # Call the function to send the message
         message_sid = send_whatsapp_message(account_sid, auth_token, from_whatsapp, to_whatsapp, content_sid, content_variables)
-        if message_sid.startswith("SM"):  # Twilio message SIDs start with "SM"
+        if message_sid.startswith(("SM", "MM")):  # Accept both SM and MM SIDs
             st.success(f"Message sent successfully! SID: {message_sid}")
         else:
             st.error(f"Error sending message: {message_sid}")
+