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: acr_translator.rb
    path of file: ./repos/vets-api/app/services/sign_in
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module SignIn
  class AcrTranslator
    attr_r
    
    def translate_mhv_values
      case acr
      when 'loa1', 'loa3', 'min'
        Constants::Auth::IDME_MHV_LOA1
      else
        raise Errors::InvalidAcrError.new message: 'Invalid ACR for mhv'
      end