You can invite other users to your account by going to your “ACCOUNT SETTINGS” and “Users”:
To invite a new user, simply click the “Invite User”-button:
Enter the full name and email of the person you would like to invite, then click “Send Invitation”. An invitation will be sent to the person you’ve invited with instructions on how to login to your account.
If the invited user doesn’t get their invitation by email within a minute or two, please ask them to check if it accidently may have slipped into their spam-folder.