nbhosting was originally designed for hosting Jupyter notebooks as a silent companion to edx-hosted courses
you use it in this original mode when attending a MOOC from e.g. fun-mooc.fr or magistere.education.fr, and for that you do not even need to known about this place - let alone authenticate

it now has an additional feature to be used in the classroom
for using it under this mode, you will need to ask your teacher for an account, and then