# File lib/aws/iam/mfa_device_collection.rb, line 42
      def enable serial_number, authentication_code_1, authentication_code_2
        client.enable_mfa_device({
          :user_name => user.name,
          :serial_number => serial_number,
          :authentication_code_1 => authentication_code_1.to_s,
          :authentication_code_2 => authentication_code_2.to_s,
        })
        self[serial_number]
      end