I designed two forms: signup and login. Simple HTML with input fields for username/email and password. Using JavaScript, I send the form data to the backend via fetch API or AJAX.

I learned quickly that validation is key:

Front-end: ensure email format is correct, password meets minimum length

Back-end: check if the username/email already exists before creating a new account

Before going live, I tested everything on localhost: signing up, logging in, wrong passwords, empty fields. Debugging early saves a lot of headaches.

Once it works, I added:

* Password reset via email

* Front-end error/success messages