Welcome to Part 23 of the Google Cloud Functions Training series! In this session, we’ll implement Email Authentication Validations to ensure secure and error-free user registration and login. We’ll add rules and checks to prevent invalid inputs, weak passwords, and duplicate accounts while maintaining a smooth user experience.

✅ What You’ll Learn in This Video:
✔️ Validating email format with regex and Firebase built-in checks
✔️ Enforcing strong password rules (length, numbers, special characters)
✔️ Preventing duplicate accounts with Firebase Auth queries
✔️ Handling and displaying Firebase Auth error messages gracefully
✔️ Securing Cloud Functions with input validation before processing

💡 Why This Step Matters:
🔹 Protects your app from weak passwords and invalid user data
🔹 Ensures clean and consistent user accounts in your system
🔹 Reduces user frustration by providing clear error feedback
🔹 Strengthens authentication security before adding advanced features like MFA