You are able to remove users from the Diamond app from the "User Settings" section on the app.
- Open Diamond App
- Once logged in, click 3 horizontal lines in top left to bring up menu
- Select "User Settings"
- Click "Add & Mange Users"
- Open the Active/Invited Users List
- Locate the Coach's Name
- Slide Left on the Name
- Select "Delete"
- Confirm the Deletion