Most events hosted by GLL require you to check-in prior to competing.
The reason for this is to show us that you are present and ready to compete so that the experience is the best possible for everyone involved.
Two hours before your game is scheduled to start a check-in button will appear on the play.gll.gg dashboard.
If you play as a team it is enough with only one team member to press the check-in button. Then all you need to do is be present by the computer a few minutes before the tournament is scheduled to start.