Make sure the csv upload experience shows loading screen until data is ready
Add the functionality to register and add a single user (instead of through CSV upload) to a class. This functionality creates new users given the email. If a user with that email doesn't exist, create a user. If a user with that email exists, go onto the next step: add the user to the class' instructors or students list (and the respective section)
Add a single student user to the class who isn't currently registered in NB:
Add a single instructor user to the class who isn't currently registered in NB:
Add a single student user to the class who isn't currently registered in NB:
Add a single instructor user to the class who isn't currently registered in NB:
End Result: