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: basic_auth_servlet.rb
    path of file: ./repos/mechanize/lib/mechanize/test_case
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
class BasicAuthServlet < WEBrick::HTTPServlet::AbstractServlet
  def do_GET(req,res)
    htpd = nil
    Tempfile.open 'dot.htpasswd' do |io|
      htpd = WEBrick::HTTPAuth::Htpasswd.new(io.path)
      htpd.set_pa
    
  def do_GET(req,res)
    htpd = nil
    Tempfile.open 'dot.htpasswd' do |io|
      htpd = WEBrick::HTTPAuth::Htpasswd.new(io.path)
      htpd.set_passwd('Blah', 'user', 'pass')
    end

    authenticator = WEBrick::HTTPAuth::BasicAuth.new({
      :UserDB => htpd,
      :Realm  => 'Blah',
      :Logger => Logger.new(nil)
    })

    begin
      authenticator.authenticate(req,res)
      res.body = 'You are authenticated'
    rescue WEBrick::HTTPStatus::Unauthorized
      res.status = 401
    end