saml_sp-8.x-3.x-dev/saml_sp.links.menu.yml

saml_sp.admin:
  title: 'SAML'
  route_name: saml_sp.admin
  description: 'Configuration SAML Service and Identity Providers'
  parent: user.admin_index
entity.idp.collection:
  title: 'Identity Providers'
  route_name: entity.idp.collection
  parent: saml_sp.admin
  description: 'Configure Identity Providers.'
  position: left
  weight: -20