achievements-2.x-dev/achievements.routing.yml

achievements.achievements_controller_userAchievements:
  path: '/user/{user}/achievements'
  defaults:
    _controller: '\Drupal\achievements\Controller\AchievementsController::userAchievements'
    _title_callback: '\Drupal\achievements\Controller\AchievementsController::userAchievementsTitle'
  requirements:
    _permission: 'access content'
    user: \d+