How to set up routes in Remix.
How to build a sign in and sign up form with validation.
How session-based authentication works.
How to protect privates routes by implementing authorization.
How to store and query your data using Prisma when creating and authenticating users.

Redirecting in Remix
Using resource routes
Filtering & sorting data with Prisma Client
Using embedded documents in your Prisma Schema
... and lots more!