Implement User Authentication

[Alpha17-2]

Enable users to sign up, log in, and manage their accounts securely within the Wave app.

• Design the authentication UI, including screens for user registration, login, and password reset.
• Create a User model class with necessary data elements (e.g., email, password) and functions for managing user data.
• Implement backend API endpoints for user registration, login, and password reset.
• Implement client-side validation for user input (e.g., email format, password strength) to enhance security.
• Develop error handling mechanisms to handle authentication failures and provide informative error messages to users.
• Implement secure storage of user authentication tokens on the client side (e.g., using encrypted storage).

DFD for Authentication module