patreon-8.x-2.x-dev/modules/patreon_user/patreon_user.routing.yml

patreon_user.patreon_user_controller_oauth:
  path: '/patreon_user/oauth'
  defaults:
    _controller: '\Drupal\patreon_user\Controller\PatreonUserController::oauth'
    _title: 'oauth'
  requirements:
    _access: 'TRUE'