-- TUTORIALS ARE TODO; THIS IS JUST AN UNUSED STUB
-- Idea: management of exercise classes, offering sub-enrolement to distribute all students among all exercise classs
Tutorial json
    name        Text
    tutor       UserId
    course      CourseId
    capacity    Int Maybe -- limit for enrolement in this tutorial
TutorialUser
    user        UserId
    tutorial    TutorialId
    UniqueTutorialUser user   tutorial