//set the authentication
call.setUsername("user@email.com");
call.setPassword("password");
//make the call to get the report
DownloadCallResult result = call.callDownloadReport();
//write the report to a temporary file
File tempfile = File.createTempFile("playtrade_orders_"+REPORT_ID+"_", ".txt");
String resultbody = result.getResultBody();
FileUtils.writeStringToFile(tempfile, resultbody, "UTF-8");