# File lib/aws/iam/virtual_mfa_device.rb, line 72
      def enable user, code1, code2

        user_name = user.is_a?(User) ? user.name : user

        client.enable_mfa_device(
          :user_name => user_name,
          :serial_number => serial_number,
          :authentication_code_1 => format_auth_code(code1),
          :authentication_code_2 => format_auth_code(code2))

        nil

      end