The author of the post, Samuel Taylor, created a Python script using the Twilio API to automate course registration for his university's online courses. The script uses web scraping with BeautifulSoup to check the availability of seats in each course and sends SMS notifications to users who have subscribed to receive updates. The script also uses Redis to store subscriptions and validates that users are asking for valid courses. The author used a Flask web framework to handle SMS messages and TwiML responses. The script is run automatically every three minutes using Cron, allowing it to notify users of available seats in real-time.