After installing the server, open a browser to the domain you used (or `http://localhost:8000` for local installs). You should be redirected to the login screen. Click the link to register a new user instead, and complete the registration.
The first user registration will always be permitted, but **subsequent registrations will require an invite link which includes a code**. You can invite additional users by clicking on your username in the top left, then selecting "Invite users".
