MainController.scala

def createGame() = Action.async { request =>
  WS.url(s"$apiUrl/game")
    .post("")
    .map {
      case res if res.status == CREATED => Created(res.body)
      case _ => InternalServerError
    }
    .recover { case _ => InternalServerError }
  }

def startGame(gameId: String, playersCount: Int) = Action.async { request =>
  val players = 1 to playersCount map { n => s"Player$n"}
  postCommand(
    url = s"/game/$gameId/start",
    data = Json.obj("players" -> players))
}

def roll(gameId: String, playerId: String) = Action.async { request =>
  postCommand(
    url = s"/game/$gameId/roll/$playerId",
    data = Json.obj())
}

private def postCommand(url: String, data: JsValue) = {
  WS.url(s"$apiUrl$url")
    .post(data)
    .map {
      case res if res.status == ACCEPTED => Accepted
      case res if res.status == BAD_REQUEST => BadRequest(res.body)
      case res => InternalServerError
    }
    .recover { case _ => InternalServerError }
}