When you have a account you can sign in into Quarterfall at https://quarterfall.app/auth/login by providing your e-mail and password. This applies when Quarterfall is used in standalone mode. For certain institutes, you will be able to login using your institution's authentication mechanism and then use Quarterfall directly. Quarterfall knows what role you have (e.g. staff or student) so it will show you the information that is appropriate for you.