Path · backendintermediate 8 hours 1 items

Auth systems from scratch

Build a real login flow. Sessions, password hashing, the works.

The destination

Ship a production-quality email-and-password login.

Who this is for

Engineers who have built a CRUD app but never written auth.

Most tutorials gloss over auth. This one builds it. You will write the hashing yourself before reaching for a library, then learn the libraries by trading your own code for theirs.

Begin path → Build the signup half of a login system

What you'll work through

01
tutorial·40 min · 3 steps·intermediate
Build the signup half of a login system
Auth is one of those parts of the stack everyone uses and almost nobody has written from scratch. We are going to fix that. By the end of this tutorial you will have a working signup endpoint with real password hashing.