To completely configure a display so no user interaction is required, enter a URL like this:
https://moments.app/display/#/EVENTID/DISPLAYID?username=USERNAME&password=PASSWORD
Where the placeholders are:
EVENTID the name of the event
DISPLAYID the ID of the display, as shown in Moments when clicking the display on the dashboard
USERNAME The display user name, as configured for the event
PASSWORD The password for the display user, as configured for the event