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: activity_logging.rb
    path of file: ./repos/sorcery/lib/sorcery/controller/submodules
    
    the code of the file until where you have to start completion: module Sorcery
  module Controller
    module Submodules
      # This submodule keeps track of events such as login, logout,
      # and last activity time, per user.
      # It helps in estimating which users are active now in the site.
      # This cannot be determined absolutely because a user might be
      # reading a page without clicking a
    
        def self.included(base)
          base.send(:include, InstanceMethods)
          Config.module_eval do
            class << self
              attr_accessor :register_login_time
              attr_accessor :register_logout_time
              attr_accessor :register_last_activity_time
              attr_accessor :register_last_ip_address

              def merge_activity_logging_defaults!
                @defaults.merge!(:@register_login_time         => true,
                                 :@register_logout_time        => true,
                                 :@register_last_activity_time => true,
                                 :@register_last_ip_address    => true
                                 )
              end
            end
            merge_activity_logging_defaults!
          end