Get report info

        Arguments:
            ledger_id:
                Id for ledger for report
            report_id:
                Report id assigned by mCASH

def get_report(self, ledger_id, report_id):
        """Get report info

        Arguments:
            ledger_id:
                Id for ledger for report
            report_id:
                Report id assigned by mCASH
        """
        return self.do_req('GET',
                           self.merchant_api_base_url + '/ledger/' +
                           ledger_id + '/report/' +
                           report_id + '/').json()