To add a new user:
Visit Menu > Settings (or just click the gear tool next to one of your properties)
Scroll down the left toolbar to the property you want to edit.
Click on User Management, then add the team member's email address. You'll be prompted to fill in their first and last name, then click the blue "Add Admin" button.
Click on the blue "Save Changes" button to save this user addition.
Note: You'll need to send your team member their email and password to log in.
To delete a user:
Visit Menu > Settings (or click the gear tool) and scroll down to the property you want to edit
Click User Management, then click the red X next to the team member's name.
Click "Save Changes" to save this deletion.