private_page-8.x-1.0-alpha1/private_page.permissions.yml

add private page:
  title: 'Add private page'
edit private page:
  title: 'Edit private page'
delete private page:
  title: 'Delete private page'
administer private page:
  title: 'Administer private page'
  restrict access: TRUE
access private page:
  title: 'Access private page'