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: github_client.rb
    path of file: ./repos/classroom/config/initializers
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module GitHubClassroom
  def self.github_client(options
    
  def self.github_client(options = {})
    options[:user_agent] = "GitHub Classroom"

    unless options.key?(:access_token)
      options[:client_id] = Rails.application.secrets.github_client_id
      options[:client_secret] = Rails.application.secrets.github_client_secret
    end