To invite more users to your Circle Account, you'll first need to log in to your account.
After logging in, tab over, in the top menu, to your "Account" section. Once you're in your "Account" section, you'll see a menu on the left. Please click, "Manager users."
In this section, you'll be able to manage all the users in your account. Click, "Invite User," to add a new user.
Once you fill out the brief form, an email will be sent to the user you invited to join your account.
If they do not respond to the email in 7 days, you will need to resend the invitation.