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: map_services_controller.rb
    path of file: ./repos/vets-api/app/controllers/v0
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require 'map/security_token/service'

module V0

    
    def token
      icn = @service_account_access_token.user_attributes['icn']
      result = MAP::SecurityToken::Service.new.token(application: params[:application].to_sym, icn:)

      render json: result, status: :ok
    rescue Common::Client::Errors::ClientError
      render json: sts_client_error, status: :bad_gateway
    rescue MAP::SecurityToken::Errors::ApplicationMismatchError
      render json: application_mismatch_error, status: :bad_request
    rescue MAP::SecurityToken::Errors::MissingICNError
      render json: missing_icn_error, status: :bad_request
    end