1. Go to Administration > Team (https://app.heymarket.com/admin/team) and click "Invite Members":
2. Type in the emails of the users you want to invite. Click the circle to confirm:
3. Click "Save" to send out the invite emails:
4. Once a user signs up for an account, then go to your Inbox (https://app.heymarket.com/admin/inboxes) and click the Person icon with the plus sign to add them to the appropriate Inbox.