Call documentation: `/user/mfa/send_challenge
        <https://www.wepay.com/developer/reference/user-mfa#send_challenge>`_,
        plus extra keyword parameter:
        
        :keyword bool batch_mode: turn on/off the batch_mode, see 
           :class:`wepay.api.WePay`

        :keyword str batch_reference_id: `reference_id` param for batch call,
           see :class:`wepay.api.WePay`

        :keyword str api_version: WePay API version, see
           :class:`wepay.api.WePay`

def __send_challenge(self, mfa_id, **kwargs):
        """Call documentation: `/user/mfa/send_challenge
        <https://www.wepay.com/developer/reference/user-mfa#send_challenge>`_,
        plus extra keyword parameter:
        
        :keyword bool batch_mode: turn on/off the batch_mode, see 
           :class:`wepay.api.WePay`

        :keyword str batch_reference_id: `reference_id` param for batch call,
           see :class:`wepay.api.WePay`

        :keyword str api_version: WePay API version, see
           :class:`wepay.api.WePay`

        """
        params = {
            'mfa_id': mfa_id
        }
        return self.make_call(self.__send_challenge, params, kwargs)