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: acme_wrapper.rb
    path of file: ./repos/ruby-acme-cli/lib/letsencrypt/cli
    
    the code of the file until where you have to start completion: require 'json'
require 'acme-client'
require 'logger'
require 'colorize'
require_relative 'support/certificate'

class AcmeWrapper
  def initialize(options)
    @options = options
    
  def find_or_create_pkey(file_path, name, length)
    if File.exists?(file_path)
      log "existing account key found"
      OpenSSL::PKey::RSA.new File.read file_path
    else
      log "creating new private key to #{file_path}..."
      private_key = OpenSSL::PKey::RSA.new(length)
      File.write(file_path, private_key.to_s)
      File.chmod(0400, file_path)
      private_key
    end