All Project Roles (Settings -> System -> Project Roles) can be viewed in People section of Project Settings but not 'atlassian-addons-project-access'. Why it is so?
atlassian-addons-project-access is a special Role, used for add-ons restrictions only. You cannot add some user to this role thru "People" menu:
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
We're bringing product updates and pro tips on teamwork to ten cities around the world.Save your spot