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: response.rb
    path of file: ./repos/gitlabhq/lib/gitlab/external_authorization
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Gitlab
  module ExternalAuthori
    
      def parse_response!
        Gitlab::Json.parse(@response.body)
      rescue JSON::JSONError
        # The JSON response is optional, so don't fail when it's missing
        nil
      end
    end