curl -H "X-Auth-Token: 9HqLlyZOugoStsXCUfD_0YdwnNnunAJF8V47U3QHXSq" \
     -H "X-User-Id: aobEdbYhXfu5hkeqG" \
     http://localhost:3000/api/v1/users.info?userId=BsNr28znDkG8aeo7W

{
  "user": {
    "_id": "nSYqWzZ4GsKTX4dyK",
    "type": "user",
    "status": "offline",
    "active": true,
    "name": "Example User",
    "utcOffset": 0,
    "username": "example",
    "avatarETag": "thwftThP3Band942S",
  },
  "success": true
}

curl -H "X-Auth-Token: 9HqLlyZOugoStsXCUfD_0YdwnNnunAJF8V47U3QHXSq" \
     -H "X-User-Id: aobEdbYhXfu5hkeqG" \
     http://localhost:3000/api/v1/users.info?userId=BsNr28znDkG8aeo7W&fields={"userRooms": 1}

{
  "user": {
    "_id": "nSYqWzZ4GsKTX4dyK",
    "createdAt": "2016-12-07T15:47:46.861Z",
    "services": {
      "password": {
        "bcrypt": ...
      },
      "email": {
        "verificationTokens": [
          {
            "token": "...",
            "address": "example@example.com",
            "when": "2016-12-07T15:47:46.930Z"
          }
        ]
      },
      "resume": {
        "loginTokens": [
          {
            "when": "2016-12-07T15:47:47.334Z",
            "hashedToken": "..."
          }
        ]
      }
    },
    "emails": [
      {
        "address": "example@example.com",
        "verified": true
      }
    ],
    "type": "user",
    "status": "offline",
    "active": true,
    "roles": [
      "user"
    ],
    "name": "Example User",
    "lastLogin": "2016-12-08T00:22:15.167Z",
    "statusConnection": "offline",
    "utcOffset": 0,
    "username": "example",
    "avatarETag": "thwftThP3Band942S",
    "rooms": [
        {
            "_id": "PoffwDEebAwcmS5A8",
            "rid": "GENERAL",
            "name": "general",
            "t": "c"
        },
        {
            "_id": "hr93s8GcJedZbkeaH",
            "rid": "oaqXoFLru3YLuau2J",
            "name": "test",
            "t": "c",
            "roles": [
                "owner"
            ]
        }
    ]
  },
  "success": true
}