Add new GithubService via Octokit
user
```ruby
module NewGithubService
  ##
  # GithubService is miq-bot's interface to the Github API. It acts as a
  # wrapper around Octokit, delegating calls directly to the Octokit client as
  # well as providing a space to keep useful augmentations of the interface for
  # our own use cases.
  #
  # You can find the official Octokit documentation at http://octokit.github.io/octokit.rb
  #
  # Please check the documentation first before adding helper methods, as they
  # may already be well handled by Octokit itself.
  #
  class << self
    def service
      @service ||= \
        begin
          require 'octokit'

          unless Rails.env.test?
            Octokit.configure do |c|
              c.login    = Settings.github_credentials.username
              c.password = Settings.github_credentials.password
              c.auto_paginate = true

              c.middleware = Faraday::RackBuilder.new do |builder|
                builder.use GithubService::Response::RatelimitLogger
                builder.use Octokit::Response::RaiseError
                builder.use Octokit::Response::FeedParser
                builder.adapter Faraday.default_adapter
              end
            end
          end

          Octokit::Client.new
        end
    end

    private

    def respond_to_missing?(method_name, include_private=false)
      service.respond_to?(method_name)
    end

    def method_missing(method_name, *args, &block)
      if service.respond_to?(method_name)
        service.send(method_name, *args, &block)
      else
        super
      end
    end
  end
end
```
assistant