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: varnish_cli_file_read.rb
    path of file: ./repos/metasploit-framework/modules/auxiliary/scanner/varnish
    
    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 'met
    
  def run_host(ip)
    # first check if we even need auth
    begin
      connect
      challenge = require_auth?
      close_session
      disconnect
      connect
      if !challenge
        print_good "#{ip}:#{rport} - LOGIN SUCCESSFUL: No Authentication Required"
      else
        if not login(datastore['PASSWORD'])
          vprint_error "#{ip}:#{rport} - Unable to Login"
          return
        end