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: runner.rb
    path of file: ./repos/fastlane/cert/lib/cert
    
    the code of the file until where you have to start completion: require 'fileutils'
require 'fastlane_core/globals'
require 'fastlane_core/cert_checker'
require 'fastlane_core/keychain_importer'
require 'fastlane_core/print_table'
require 'spacesh
    
    def revoke_expired_certs!
      FastlaneCore::PrintTable.print_values(config: Cert.config, hide_keys: [:output_path], title: "Summary for cert #{Fastlane::VERSION}")

      login

      to_revoke = expired_certs

      if to_revoke.empty?
        UI.success("No expired certificates were found to revoke! üëç")
        return
      end