Will give you info about the user who logged in using your app.
Will give you detailed information on how many XP were earned by the user.
Get a list of all courses this user is a member of. Courses are essentially the classes or subjects the user is being graded in.
Get the amount of cubes of a user (explanation on the page).
Gives you a percentage how many XP in comparison to the max XP a user got in a specific course. This should be your primary data source if you want to give the user special rewards for good grades.