How can I get user profile on battle.net oauth

Question

I'm tring to login with Blizzard ID in my site. I think my code is work. User profile request failed. I don't understand Blizzard's user profile Data structure. Can you help me to get user's Id, Email and Battle Tag?

Here's my code

<?php
class Hybrid_Providers_Kakao extends Hybrid_Provider_Model_OAuth2
{
/**
* initialization
*/
function initialize()
{
    parent::initialize();

    // Provider API end-points
    $this->api->api_base_url  = "https://kr.api.battle.net/";
    $this->api->authorize_url = "https://kr.battle.net/oauth/authorize";
    $this->api->token_url     = "https://kr.battle.net/oauth/token";

    // redirect uri mismatches when authenticating with Battle.
    if (isset($this->config['redirect_uri']) && !empty($this->config['redirect_uri'])) {
        $this->api->redirect_uri = $this->config['redirect_uri'];
    }
}

/**
* finish login step
*/
function loginFinish()
{
    $error = (array_key_exists('error', $_REQUEST)) ? $_REQUEST['error'] : "";
    // check for errors
    if ( $error ){
        throw new Exception( "Authentication failed! {$this->providerId} returned an error: $error", 5 );
    }
    // try to authenicate user
    $code = (array_key_exists('code', $_REQUEST)) ? $_REQUEST['code'] : "";
    try{
        $this->authenticate( $code );
    }
    catch( Exception $e ){
        throw new Exception( "User profile request failed! {$this->providerId} returned an error: $e", 6 );
    }
    // check if authenticated
    if ( ! $this->api->access_token ){
        throw new Exception( "Authentication failed! {$this->providerId} returned an invalid access token.", 5 );
    }
    // store tokens
    $this->token("access_token",  $this->api->access_token);
    $this->token("refresh_token", $this->api->refresh_token);
    $this->token("expires_in",    $this->api->access_token_expires_in);
    $this->token("expires_at",    $this->api->access_token_expires_at);
    // set user connected locally
    $this->setUserConnected();
}

/**
* load the user profile
*/
function getUserProfile()
{

    $this->api->decode_json = false;
    $this->api->curl_header = array( 'Authorization: Bearer ' . $this->api->access_token );

    $data = $this->api->api("account/profile", "POST");

    if ( ! isset( $data->id ) ) {
        throw new Exception("User profile request failed! {$this->providerId} returned an invalid response.", 6);
    }
    # store the user profile.
    $this->user->profile->identifier  = @ $data->id;
    $this->user->profile->displayName = @ $data->battletag;
    return $this->user->profile;
}

private function authenticate($code)
{
    $params = array(
        "response_type" => $code,
        "grant_type"    => "authorization_code",
        "client_id" => $this->api->client_id,
        "redirect_uri" => $this->api->redirect_uri,
        "state" => $token,
        "scope" => "sc2.profile",
    );

    if( $this->api->client_secret && ($this->api->client_secret !== $this->api->client_id) ){
        $params['client_secret'] = $this->api->client_secret;
    }

    $response = $this->request($this->api->token_url, $params, $this->api->curl_authenticate_method);
    $response = $this->parseRequestResult($response);
    if ( ! $response || ! isset($response->access_token) ) {
        throw new Exception("The Authorization Service has return: " . $response->error);
    }
    if ( isset($response->access_token) )  $this->api->access_token            = $response->access_token;
    if ( isset($response->refresh_token) ) $this->api->refresh_token           = $response->refresh_token;
    if ( isset($response->expires_in) )    $this->api->access_token_expires_in = $response->expires_in;

    // calculate when the access token expire
    if ( isset($response->expires_in) ) {
        $this->api->access_token_expires_at = time() + $response->expires_in;
    }

    return $response;
}

private function request($url, $params=false, $type="GET")
{
    if(Class_exists('Hybrid_Logger')){
        Hybrid_Logger::info("Enter OAuth2Client::request( $url )");
        Hybrid_Logger::debug("OAuth2Client::request(). dump request params: ", serialize( $params ));
    }
    $this->http_info = array();
    $ch = curl_init();

    curl_setopt($ch, CURLOPT_URL           , $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_TIMEOUT       , $this->api->curl_time_out);
    curl_setopt($ch, CURLOPT_USERAGENT     , $this->api->curl_useragent);
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $this->api->curl_connect_time_out);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, $this->api->curl_ssl_verifypeer);
    curl_setopt($ch, CURLOPT_HTTPHEADER    , $this->api->curl_header);

    if ( $this->api->curl_proxy ) {
        curl_setopt( $ch, CURLOPT_PROXY, $this->curl_proxy);
    }
    if ( $type == "POST" ) {
        curl_setopt($ch, CURLOPT_POST, 1);
        if ($params) curl_setopt( $ch, CURLOPT_POSTFIELDS, http_build_query($params) );
    }

    $response = curl_exec($ch);
    if(Class_exists('Hybrid_Logger')){
        Hybrid_Logger::debug( "OAuth2Client::request(). dump request info: ", serialize(curl_getinfo($ch)) );
        Hybrid_Logger::debug( "OAuth2Client::request(). dump request result: ", serialize($response ));
    }
    $this->http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    $this->http_info = array_merge($this->http_info, curl_getinfo($ch));
    curl_close ($ch);

    return $response;
}

private function parseRequestResult($result)
{
    if ( json_decode($result) ) return json_decode($result);
    parse_str( $result, $ouput );
    $result = new StdClass();
    foreach( $ouput as $k => $v )
        $result->$k = $v;

    return $result;
}
}

I think this code can't read user id

    $this->user->profile->identifier  = @ $data->id;
    $this->user->profile->displayName = @ $data->battletag;

on this part.

It's not pure HybridAuth.