how to get the firstname and email from the JSON responce in IBMworklight :     {
  "userId": 1,
  "userName": "username",
  "firstName": "firstname",
  "lastName": "lname",
  "middleInitial": null,
  "email": "nsk@gmail.com",
  "dob": -250666200000,
  "phoneNo": 2066628405,
  "workPhone": null,
  "mobileNo": 2036321543,
  "status": null,
  "address": null,
  "group": null
}