Collections ->
[Users] -_id -email -level -name (optional)
[UsersClasses] -_id -user_id -course_id -date
[Lecture] -_id -course_id -time -location -url
[Course] -_id -title -description
testing database is set to mongodb://localhost/test-database so mongo needs to be running in order to run tests
npm test => runs all tests once npm run test-watch => runs all tests each time a change is saved
