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: api.rb
    path of file: ./repos/Faalis/lib/faalis
    
    the code of the file until where you have to start completion: # -----------------------------------------------------------------------------
#    Faalis - Basic website skel engine
#    Copyright (C) 2012-2013 Yellowen
#
#    This program is free software; you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation; either version 2 of 
    
      def self.setup_api

        # TODO: Allow user to configure this section
        version 'v1', :vendor => "Yellowen"
        format :json
        default_format :json

        # TODO: Give this class a logger

        helpers do

          def warden
            env['warden']
          end

          def current_user
            warden.user
          end

          def authenticated_user
            if warden.authenticated?
              return true
            else
              error!('401 Unauthorized', 401)
            end
          end

        end