This is a simple exercise. You just need a CSC account with Pouta access, you can get it in two ways:
You have been provided with a training account username and password.
If not, follow the How to create new user account. Once you got an account, you need the account to be member of a project with Pouta access, follow Creating a new project and Adding service access for a project.
Go to https://pouta.csc.fi and log in.