Choose the "I have an Edu-ID account" option if you belong to UNIL or if you have anEdu-ID account
You can create an Edu-ID account if you want, this is a free account that gives you access to a variety of academic services in Switzerland, more information :https://help.switch.ch/eduid/faqs/
If you don't have an Edu-ID account and don't want to create one, select the "I don't have an Edu-ID account" option, and you'll simply be asked to set a password during registration so that you can reconnect to the platform later