There are two different types of users when inviting members to a project.
(1.) Users to collaborate to build the app in the modeler via the different types of roles ex. (SCRUM Master, Business Engineer, Product Owner)
App Developer Portal: Team → Invite Member
(2.) Users that can get access to the deployed app for using, testing, or providing feedback ex. ( Administrator, User)
App Developer Portal: General Settings → Access Management → Invite Users