In the control center you add users who are supposed to get permanent access to a door. You can also delete users. Here you can give users the right to share keys. In addition, the panel provides a complete overview of doors and users.
On the right side you can see all the doors. You can click on the different doors to see who has access and administer the access' to that door.
On the left side you can see everyone who has access. You can also search for users. If you press a user you will be able to administer their rights.
By pressing "Add user" you can give access to a user. See here how.