To add a new rep:
In MCA Pilot, go to Settings > Workspace
Click the green "Manage Subscription" button, enter your billing email that you initially signed up with, verify with code
Increase the number of seats and update subscription
After ~5 seconds, the "New User" button will show up on the top right of the Team Members table - click it
Enter new rep's email, name, and optionally enter their Form ID in the "Unique App ID" field
And that's it.
If you ever need to delete a user, just hover your mouse over them and click the "Delete" button.
You'll see an available seat show up after 5 seconds and then you'll be able to add a new rep.
For seat billing changes, refunds when you lower seats, and the Customer Portal path, see How to change seats and update your subscription. For the full rep setup path covering seats, deal visibility, submit permissions, and sender access, see How to Set Up Rep Access, Manager Visibility, and Sender Permissions.