When creating a project, you assign access to “Collaborators” or “Viewers.” Only the people you assign as Collaborators or Viewers can access the project and see it on the project overview page.
About Collaborators: Collaborators have the same access to the project as the person who created it. This includes editing access permissions and sending invitations.
About Viewers: Viewers can only view the project and individual results but cannot edit the project or invite candidates.