How to use the azure-iothub.JobClient.fromSharedAccessSignature function in azure-iothub

var getSas = require('./common.js').getSas;
var JobClient = require('azure-iothub').JobClient;
var showDeprecationText = require('./common.js').showDeprecationText;

showDeprecationText('az iot hub job cancel');

program
  .description('Cancel existing job')
  .usage('[options] ')
  .option('-l, --login ', 'use the connection string provided as argument to use to authenticate with your IoT Hub instance')
  .parse(process.argv);

var jobId = program.args[0];
var sas = getSas(program.login);

var jobClient =  JobClient.fromSharedAccessSignature(sas);
jobClient.cancelJob(jobId, function (err) {
  if (err) {
    serviceError(err);
  } else {
    console.log('Job ' + jobId + ' cancelled');
  }
});

var showDeprecationText = require('./common.js').showDeprecationText;

showDeprecationText('az iot hub job list');

program
  .description('Query existing jobs')
  .usage('[options] [job-type] [job-status]')
  .option('-l, --login ', 'use the connection string provided as argument to use to authenticate with your IoT Hub instance')
  .option('-r, --raw', 'use this flag to return raw output instead of pretty-printed output')
  .parse(process.argv);

var jobType = program.args[0];
var jobStatus = program.args[1];
var sas = getSas(program.login);

var jobClient =  JobClient.fromSharedAccessSignature(sas);
var query = jobClient.createQuery(jobType, jobStatus);
var onNewResults = function(err, results) {
  if (err) {
    serviceError(err);
  } else {
    results.forEach(function(job) {
      var output = program.raw ? JSON.stringify(job) : prettyjson.render(job);
      console.log(output);
    });

    if(query.hasMoreResults) {
      query.next(onNewResults);
    }
  }
};
query.next(onNewResults);