You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: ppiu_controller.rb
    path of file: ./repos/vets-api/app/controllers/v0
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require 'evss/ppiu/service'

module V0
  class
    
    def update
      response = service.update_payment_information(pay_info)
      Rails.logger.warn('PPIUController#update request completed', sso_logging_info)
      send_confirmation_email
      render json: response,
             serializer: PPIUSerializer
    end