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: show_command.rb
    path of file: ./repos/kontena/cli/lib/kontena/cli/services
    
    the code of the file until where you have to start completion: require_relative 'services_helper'

mo
    
    def execute
      require_api_url
      token = require_token

      show_service(token, name)
      begin
        show_service_instances(token, name)
      rescue Kontena::Errors::StandardError => exc
        if exc.status == 404
          # fallback to old behaviour
          show_service_containers(token, name)
        end