An administrator can add as many people as you need.
Invite someone
Click your organization name in the top right.
Click Manage.
Open Members, then Invite.
Enter their work email and role.
After they accept, assign the buildings they should see.
They will get an email. They must use that same email to sign in.
If they need extra buildings later, an admin can add those on their member record. They will only see referrals for buildings they are assigned to.
This same process can be used to remove users or facilities