How to use a NestJS Auth Guard to simplify your code

In this video, I show how the implementation of a NestJS Auth Guard really simplifies my code and makes writing unit tests for my API services a lot cleaner and easier.

I use the example of a user getting their own project. The guard checks if a user has access to a project before making any further requests, thus simplifying the code and reducing the need for repeated checks within the CRUD methods.