Before you get started, take a look at https://github.com/Npikielny/ios-course-messageBoard for your API spec. Understand what the endpoints are, their HTTP request methods, and what the request body (parameter) requires (if any).
You can also download and import the POSTMAN collection below for understanding how the requests work
Most of the instructions are in NetworkManager. You will be making changes to the Post, NetworkManager, and ViewController files.