How to invite users to a project
Click on the cogwheel in the top right corner to go to the Settings page.
Click the Users tab and then on Create new.
Assign the user a role. Choose between Admin and User. Admins are allowed to change billing information.
Enter an email address to send a project invitation to.
The email contains a link to accept the invitation. When clicking the link, the new user gets to choose an account password.
The new user is now logged in and has access to the project.