Register and Login API Endpoints
Explore how to create secure register and login API endpoints using a hashed password model with bcrypt. Learn to handle duplicate emails, verify credentials safely, and avoid exposing sensitive info in error messages. Understand why consistent responses prevent account enumeration risks while establishing secure user authentication methods.
We'll cover the following...
With a secure User model in place, the next step is the two endpoints that use it. Registration creates an account; login verifies one. Both look simple, but each has error cases that, handled carelessly, either break the app or leak security information. This lesson builds both controllers on the model from the previous lesson, covering the happy path and the full set of error cases.
Note: These are Express controllers and are read-along: they need the request and response objects to run. They use the
Usermodel andbcryptjsfrom the previous lesson.
To make the flow concrete, the next visual should show register and login moving through validation, the database, and the response.
That starts with creating an account.
The register endpoint
POST /auth/register takes the new user’s details, ensures the email is not ...