How to create user with role(s) through REST service?

Question

I could able to create a new user by the following JSON format.(Using POSTER add-on to post this data to REST service.)

{
   "name":"user34",
   "pass":"3323",
   "mail":"[email protected]",
   "status":"1"
}

My question is how to create a user with specific role. I tried with the following JSON format.

{
   "name":"user35",
   "pass":"pwds3",
   "mail":"[email protected]",
   "status":"1",
   "roles":{
      "2":"authenticated user",
      "4":"moderator"
   }
}

but the response gives the following error

["An illegal choice has been detected. Please contact the site administrator."]

Answer 1

After many trials, I was able to resolve my issue

Here is the JSON format to create user with role.

{
   "name":"user343",
   "pass":"kes35@r4",
   "mail":"[email protected]",
   "status":"1",
   "roles":[
      "4"
   ]
}

To assign multiple roles,

{
   "name":"user344",
   "pass":"kes344@r4",
   "mail":"[email protected]",
   "status":"1",
   "roles":[
      "3",
      "4"
   ]
}

I hope this helps someone.

Answer 2

This helped!

I used the request URL endpoint/user/register and passed headers content-type as application/json and X-CSRF-TOKEN which I got by login to the system.

Thanks.