Update app.py

app.py

@@ -28,7 +28,7 @@ def respond_to_user(update: Update, context: CallbackContext):
     response_text = get_gpt_response(update.message.text)
     update.message.reply_text(response_text)
 
-updater = Updater('5738478743:AAG9QbRtxWLoFIR9yVW7prnsRNsysaUeYDo')
+updater = Updater(os.environ['telegram_token'])
 updater.dispatcher.add_handler(CommandHandler("start", hello))
 updater.dispatcher.add_handler(MessageHandler(Filters.text & ~Filters.command, respond_to_user))
 updater.start_polling()