To add a collaborator, click on the "+" sign in the top-right hand corner of your Dashboard and select Add an employee.
An employee is a person who works in the same company/organisation/cooperative as you. Their account will be covered by your subscription.
Then, enter your collaborator's email address. He will receive an email to create his account and join your organization.
⚠️ If you don't want this person to be covered by your subscription, it means that the person you want to invite is a neighbor.