This feature is available to Team Owner and Admins only.
As an Owner or Admin, select the team for which you want to see the members. You can do this by clicking the drop-down menu under the account name which will display all your teams.
Once inside the team, click the Users button on the left menu pane.
To add a teammate
Click on Invite Users button on top right, add the email addresses of the people you want to invite separated by commas or space, and select their Role as either Admin or Member.
To remove a teammate
Click on the delete icon on the right of the team member you want to remove. Confirm the warning and the the teammate will be removed from your team. You can always add the teammate again anytime in the future.