fortnox-8.x-1.x-dev/modules/fortnox_credentials/fortnox_credentials.routing.yml

fortnox_credentials.add_or_view_credentials:
  path: '/user/{user}/credentials'
  defaults:
    _controller: '\Drupal\fortnox_credentials\Controller\UserLocalTask::userLocalTaskRouting'
    title: 'Credentials'
  requirements:
    _permission: 'add credentials entities'
  options:
    _admin_route: TRUE