games-wishlist/docs/api/games/Add game.bru

meta {
  name: Add game
  type: http
  seq: 2
}

post {
  url: {{base_url}}/api/user/games
  body: json
  auth: inherit
}

body:json {
  {
    "steamAppId": 105600
  }
}

settings {
  encodeUrl: true
  timeout: 0
}