you can approve a new user on your IED by going to menu "Settings" > tab "Members" > choose "Action" for pending member.
you can create an user group "app.co-admin" on your edge device and add the app Performance Insight to the group. Then you can invite one or more user to this group. When the user then logs into the edge device with his credentials, he can open the app as admin.
When I try to log in, how do I approve a new member as a Admin?
I get the following message below: