You will need to be invited by an existing Cocoon household member. They can add you at the end of the set-up process by opting to add another member. Similarly, once set up, new users can be added via the option within the app menu. As the new member, you’ll be sent your invite via an SMS.
Each additional household member will need an invite link and each link can only be used once.
Having trouble? Check out some steps - Here