User accounts

A user represents an identity within the server. Every user is registered and has a profile for other users to find and become friends with or join groups and chat.

A user can own records, share public information with other users, and authenticate via a variety of different social providers.

Fetch account

When a user has a session you can retrieve their account. The profile contains a variety of information which includes various "linked" social providers.

curl http://127.0.0.1:7350/v2/account \
  -H 'authorization: Bearer <session token>'

const account = await client.getAccount(session);
const user = account.user;
console.info("User id '%o' and username '%o'.", user.id, user.username);
console.info("User's wallet:", account.wallet);

var account = await client.GetAccountAsync(session);
var user = account.User;
System.Console.WriteLine("User id '{0}' username '{1}'", user.Id, user.Username);
System.Console.WriteLine("User wallet {0}", account.Wallet);

var account = await client.GetAccountAsync(session);
var user = account.User;
Debug.LogFormat("User id '{0}' username '{1}'", user.Id, user.Username);
Debug.LogFormat("User wallet {0}", account.Wallet);

auto successCallback = [](const NAccount& account)
{
  CCLOG("User's wallet: %s", account.wallet.c_str());
};
client->getAccount(session, successCallback);

client.getAccount(session)
  .then(function(account) {
      cc.log("User's wallet:", account.wallet);
    },
    function(error) {
      cc.error("get account failed:", JSON.stringify(error));
    });

auto successCallback = [](const NAccount& account)
{
  CCLOG("User's wallet: %s", account.wallet.c_str());
};
client->getAccount(session, successCallback);

Account account = client.getAccount(session);
User user = account.getUser();
System.out.format("User id %s username %s", user.getId(), user.getUsername());
System.out.format("User wallet %s", account.getWallet());

// Requires Nakama 1.x
let message = SelfFetchMessage()
client.send(message: message).then { selfuser in
  NSLog("User id '%@' and handle '%@'", selfuser.id, selfuser.handle)
  NSLog("User has JSON metadata '%@'", selfuser.metadata)
}.catch { err in
  NSLog("Error %@ : %@", err, (err as! NakamaError).message)
}

GET /v2/account
Host: 127.0.0.1:7350
Accept: application/json
Content-Type: application/json
Authorization: Bearer <session token>

Some information like wallet, device IDs and custom ID are private but part of the profile is visible to other users.

Public field Description
user.id The unique identifier for the user.
user.username A unique nickname for the user.
user.display_name The display name for the user (empty by default).
user.avatar_url A URL with a profile picture for the user (empty by default).
user.lang The preferred language settings for the user (default is "en").
user.location The location of the user (empty by default).
user.timezone The timezone of the user (empty by default).
user.metadata A slot for custom information for the user - only readable from the client.
user.edge_count Number of friends this user has.
user.facebook_id Facebook identifier associated with this user.
user.google_id Google identifier associated with this user.
user.gamecenter_id GameCenter identifier associated with this user.
user.steam_id Steam identifier associated with this user.
user.create_time A timestamp for when the user was created.
user.update_time A timestamp for when the user was last updated.
user.online A boolean that indicates whether the user is currently online or not.
Private fields Description
email Email address associated with this user.
devices List of device IDs associated with this user.
custom_id Custom identifier associated with this user.
wallet User's wallet - only readable from the client.
verifiy_time A timestamp for when the user was verified (currently only used by Facebook).

User metadata

You can store additional fields for a user in user.metadata which is useful to share data you want to be public to other users. Metadata is limited to 16KB per user. This can be set only via the script runtime, similar to the wallet.

Tip

We recommend you choose user metadata to store very common fields which other users will need to see. For all other information you can store records with public read permissions which other users can find.

Virtual wallet

Nakama has the concept of a virtual wallet and transaction ledger. Nakama allows developers to create, update and list changes to the user's wallet. This operation has transactional guarantees and is only achievable with the script runtime.

With server-side code it's possible to update the user's wallet.

local nk = require("nakama")

local user_id = "95f05d94-cc66-445a-b4d1-9e262662cf79" -- who to send
local content = {
  reward_coins = 1000
}

local status, err = pcall(nk.wallet_update, user_id, content)
if (not status) then
  nk.logger_info(("User wallet update error: %q"):format(err))
end

The wallet is private to a user and cannot be seen by other users. You can fetch wallet information for a user via Fetch Account operation.

Online indicator

Nakama can report back user online indicators in two ways:

  1. Fetch user information. This will give you a quick snapshot view of the user's online indicator and is not a reliable way to detect user presence.
  2. Publish and subscribe to user status presence updates. This will give you updates when the online status of the user changes (along side a custom message).

Fetch users

You can fetch one or more users by their IDs or handles. This is useful for displaying public profiles with other users.

curl "http://127.0.0.1:7350/v2/user?ids=userid1&ids=userid2&usernames=username1&usernames=username2&facebook_ids=facebookid1" \
  -H 'authorization: Bearer <session token>'

const users = await client.getUsers(session, ["user_id1"], ["username1"], ["facebookid1"]);
users.foreach(user => {
  console.info("User id '%o' and username '%o'.", user.id, user.username);
});

var ids = new[] {"userid1", "userid2"};
var usernames = new[] {"username1", "username2"};
var facebookIds = new[] {"facebookid1"};
var result = await client.GetUsersAsync(session, ids, usernames, facebookIds);
foreach (var u in result.Users)
{
  System.Console.WriteLine("User id '{0}' username '{1}'", u.Id, u.Username);
}

var ids = new[] {"userid1", "userid2"};
var usernames = new[] {"username1", "username2"};
var facebookIds = new[] {"facebookid1"};
var result = await client.GetUsersAsync(session, ids, usernames, facebookIds);
foreach (var u in result.Users)
{
  Debug.LogFormat("User id '{0}' username '{1}'", u.Id, u.Username);
}

auto successCallback = [](const NUsers& users)
{
  for (auto& user : users.users)
  {
    CCLOG("User id '%s' username %s", user.id.c_str(), user.username.c_str());
  }
};
client->getUsers(session,
    { "user_id1" },
    { "username1" },
    { "facebookid1" },
    successCallback);

client.getUsers(session, ["user_id1"], ["username1"], ["facebookid1"])
  .then(function(users) {
      cc.log("Users:", JSON.stringify(users));
    },
    function(error) {
      cc.error("get users failed:", JSON.stringify(error));
    });

auto successCallback = [](const NUsers& users)
{
  for (auto& user : users.users)
  {
    std::cout << "User id '" << user.id << "' username " << user.username << std::endl;
  }
};
client->getUsers(session,
    { "user_id1" },
    { "username1" },
    { "facebookid1" },
    successCallback);

List<String> ids = Arrays.asList("userid1", "userid2");
List<String> usernames = Arrays.asList("username1", "username1");
String[] facebookIds = new String[] {"facebookid1"};
Users users = client.getUsers(session, ids, usernames, facebookIds).get();

for (User user : users.getUsersList()) {
  System.out.format("User id %s username %s", user.getId(), user.getUsername());
}

// Requires Nakama 1.x
let userID // a User ID
var message = UsersFetchMessage()
message.userIDs.append(userID)
client.send(message: message).then { users in
  for user in users {
    NSLog("User id '%@' and handle '%@'", user.id, user.handle)
  }
}.catch { err in
  NSLog("Error %@ : %@", err, (err as! NakamaError).message)
}

GET /v2/user?ids=userid1&ids=userid2&usernames=username1&usernames=username2&facebook_ids=facebookid1
Host: 127.0.0.1:7350
Accept: application/json
Content-Type: application/json
Authorization: Bearer <session token>

You can also fetch one or more users in server-side code.

local nk = require("nakama")

local user_ids = {
  "3ea5608a-43c3-11e7-90f9-7b9397165f34",
  "447524be-43c3-11e7-af09-3f7172f05936"
}
local users = nk.users_get_id(user_ids)
for _, u in ipairs(users)
do
  local message = ("username: %q, displayname: %q"):format(u.username, u.display_name)
  nk.logger_info(message)
end

Update account

When a user is registered most of their profile is setup with default values. A user can update their own profile to change fields but cannot change any other user's profile.

curl http://127.0.0.1:7350/v2/account \
  -H 'authorization: Bearer <session token>' \
  --data '{
    "display_name": "My new name",
    "avatar_url": "http://graph.facebook.com/avatar_url",
    "location": "San Francisco"
  }'

await client.updateAccount(session, {
  display_name: "My new name",
  avatar_url: "http://graph.facebook.com/avatar_url",
  location: "San Francisco"
});

const string displayName = "My new name";
const string avatarUrl = "http://graph.facebook.com/avatar_url";
const string location = "San Francisco";
await client.UpdateAccountAsync(session, null, displayName, avatarUrl, null, location);

const string displayName = "My new name";
const string avatarUrl = "http://graph.facebook.com/avatar_url";
const string location = "San Francisco";
await client.UpdateAccountAsync(session, null, displayName, avatarUrl, null, location);

client->updateAccount(session,
    opt::nullopt,
    "My new name", // display name
    "http://graph.facebook.com/avatar_url", // avatar URL
    opt::nullopt, 
    "San Francisco" // location
    );

client.updateAccount(session, {
  display_name: "My new name",
  avatar_url: "http://graph.facebook.com/avatar_url",
  location: "San Francisco"
});

client->updateAccount(session,
    opt::nullopt,
    "My new name", // display name
    "http://graph.facebook.com/avatar_url", // avatar URL
    opt::nullopt, 
    "San Francisco" // location
    );

String displayName = "My new name";
String avatarUrl = "http://graph.facebook.com/avatar_url";
String location = "San Francisco";
client.updateAccount(session, null, displayName, avatarUrl, null, location);

// Requires Nakama 1.x
var message = SelfUpdateMessage()
message.avatarUrl = "http://graph.facebook.com/avatar_url"
message.fullname = "My New Name"
message.location = "San Francisco"
client.send(message: message).then {
  NSLog("Successfully updated yourself.")
}.catch { err in
  NSLog("Error %@ : %@", err, (err as! NakamaError).message)
}

PUT /v2/account HTTP/1.1
Host: 127.0.0.1:7350
Accept: application/json
Content-Type: application/json
Authorization: Bearer <session token>

{
  "display_name": "My new name",
  "avatar_url": "http://graph.facebook.com/avatar_url",
  "location": "San Francisco"
}

With server-side code it's possible to update any user's profile.

local nk = require("nakama")

local user_id = "4ec4f126-3f9d-11e7-84ef-b7c182b36521" -- some user's id.
local metadata = {}
local username = "my-new-username"
local display_name = "My new Name"
local timezone = nil
local location = "San Francisco"
local lang_tag = nil
local avatar_url = "http://graph.facebook.com/avatar_url"

local status, err = pcall(nk.account_update_id, metadata, username, display_name, timezone, location, lang_tag, avatar_url)
if (not status) then
  nk.logger_info(("Account update error: %q"):format(err))
end