Accounts can be shared across multiple users. This is perfect for multiple team members that need to share a single account.
Editing an existing user
1.) Go to Account Settings
2.) Select the Users panel. Click the pencil sign to editing an existing user.
3.) Update the user information and click Save.
Note: Currently the email address is not an editable field. If editing an email address is required. Here's the support article for adding a new user: Adding a new account user