next-auth VS jwt-decode

Auth.js (successor of NextAuth) is a flexible authentication library that supports many authentication providers and strategies. Although you can use many external services for auth, simply storing everything inside your database is often the easiest way to get started.

NextAuth.js is not perfect. One of the shortcomings is that it currently does not implement federated logout. This means that even if a user signs out of the Next.js app, he does NOT get signed out of the Cognito user pool client. As a consequence, the user is not really being logged out (i.e he is able to login again without providing the credentials). You can read more about this problem in this Github thread.

NextAuth for adding auth

Let's learn a bit about Descope and how to use it with Auth.js (next-auth) to protect our Next.js app with role-based access control (RBAC).

https://github.com/nextauthjs/next-auth/issues/5647#issuecom...

Next Auth CognitoProvider Internal Library: https://github.com/nextauthjs/next-auth/blob/v4/packages/next-auth/src/providers/cognito.ts

I mentioned this in an age-old discussion on NextAuth GitHub repo.

Authentication is a fundamental part of most web applications. Integrating authentication into your Next.js app can be simplified with NextAuth, a powerful authentication library that supports various authentication methods. However, the documentation around setting up NextAuth with the "Credentials" auth provider might not be as clear as you'd hope. My implementation is greatly enriched and partially based on Next-Auth docs and the following github thread.

For Auth: https://authjs.dev/ - works like a charm with Svelte https://authjs.dev/reference/sveltekit

NextAuth.js

Now I should mention it's NOT recommended to do this manually. There are great libraries that can help (examples PHP/NodeJS). For the sake of completeness here's how you do it.

A JS library i found for decoding JWT: https://github.com/auth0/jwt-decode

https://github.com/auth0/jwt-decode Again, thanks the developers.

To do all of that, the code would end up looking like that (or any other language alternative) - or you just use a library like jwt-decode. But it is always good to know what they do.