```ruby
class Api::AttemptsController < Api::BaseController
  def index
    attempts = current_player.attempts
    render json: AttemptRepresenter.for_collection.new(attempts)
  end

  def show
    attempt = current_player.attempts.find(params[:id])
    render json: AttemptRepresenter.new(attempt)
  end

  def create
    attempt = if (attempt = current_player.attempts.in_progress.first)
      attempt
    else
      current_player.attempts.create(started_at: Time.current)
    end

    render json: AttemptRepresenter.new(attempt)
  end

  def update
    attempt = current_player.attempts.in_progress.find(params[:id])
    if attempt.finished_at.nil?
      attempt.update_attributes(finished_at: Time.current)
    end

    if params[:nickname]
      current_player.update_attributes(nickname: params[:nickname])
    end

    render json: AttemptRepresenter.new(attempt)
  end
end
```

Store the nickname on start
user
```ruby
class Api::AttemptsController < Api::BaseController
  def index
    attempts = current_player.attempts
    render json: AttemptRepresenter.for_collection.new(attempts)
  end

  def show
    attempt = current_player.attempts.find(params[:id])
    render json: AttemptRepresenter.new(attempt)
  end

  def create
    attempt = if (attempt = current_player.attempts.in_progress.first)
      attempt
    else
      current_player.attempts.create(started_at: Time.current)
    end

    if params[:nickname]
      current_player.update_attributes(nickname: params[:nickname])
    end

    render json: AttemptRepresenter.new(attempt)
  end

  def update
    attempt = current_player.attempts.in_progress.find(params[:id])
    if attempt.finished_at.nil?
      attempt.update_attributes(finished_at: Time.current)
    end

    if params[:nickname]
      current_player.update_attributes(nickname: params[:nickname])
    end

    render json: AttemptRepresenter.new(attempt)
  end
end
```
assistant