json — обработка ответов Fitbit API в переполнении стека

Я использую библиотеку PHP (https://github.com/djchen/oauth2-fitbit) восстановить данные пользователей Fitbit через Oauth2. Я получаю данные правильно, но я не уверен, как получить определенный элемент из многомерного массива ответа.

Я использую код ниже, но не работает

$response = $provider->getResponse($request);
var_dump($response['encodedId'][0]);

Полный код PHP

  $provider = new djchen\OAuth2\Client\Provider\Fitbit([
'clientId'          => 'xxx',
'clientSecret'      => 'xxx',
'redirectUri'       => 'http://xxx-env.us-east-1.elasticbeanstalk.com/a/fitbitapi'
]);

// start the session
session_start();

// If we don't have an authorization code then get one
if (!isset($_GET['code'])) {

// Fetch the authorization URL from the provider; this returns the
// urlAuthorize option and generates and applies any necessary parameters
// (e.g. state).
$authorizationUrl = $provider->getAuthorizationUrl();

// Get the state generated for you and store it to the session.
$_SESSION['oauth2state'] = $provider->getState();

// Redirect the user to the authorization URL.
header('Location: ' . $authorizationUrl);
exit;

// Check given state against previously stored one to mitigate CSRF attack
} elseif (empty($_GET['state']) || ($_GET['state'] !== $_SESSION['oauth2state'])) {
unset($_SESSION['oauth2state']);
exit('Invalid state');

} else {

try {

// Try to get an access token using the authorization code grant.
$accessToken = $provider->getAccessToken('authorization_code', [
'code' => $_GET['code']
]);

// We have an access token, which we may use in authenticated
// requests against the service provider's API.
echo $accessToken->getToken() . "\n";
echo $accessToken->getRefreshToken() . "\n";
echo $accessToken->getExpires() . "\n";
echo ($accessToken->hasExpired() ? 'expired' : 'not expired') . "\n";

// Using the access token, we may look up details about the
// resource owner.
$resourceOwner = $provider->getResourceOwner($accessToken);

var_export($resourceOwner->toArray());

// The provider provides a way to get an authenticated API request for
// the service, using the access token; it returns an object conforming
// to Psr\Http\Message\RequestInterface.
$request = $provider->getAuthenticatedRequest(
'GET',
'https://api.fitbit.com/1/user/-/profile.json',
$accessToken
);
// Make the authenticated API request and get the response.
$response = $provider->getResponse($request);
var_dump($response['encodedId'][0]);

Данные ответа

eyJhbGciOiJIUzI1NiJ9.eyJleHAiOjE0NjAzNzgxOTYsInNjb3BlcyI6InJ3ZWkgcnBybyByaHIgcmxvYyByc2xlIHJzZXQgcmFjdCByc29jIiwic3ViIjoiNEg4NU5WIiwiYXVkIjoiMjI3UUNXIiwiaXNzIjoiRml0Yml0IiwidHlwIjoiYWNjZXNzX3Rva2VuIiwiaWF0IjoxNDYwMzc0NTk2fQ.NN9OOx — 3YLvwai0hl0ZRJ4MNWXlaMwcEJ_xxxxxb2382a930144c3a76e69567dcbf0d9834c574919fff8c268b378e635735f1bbf 1460378196 не просрочена массив ( ‘encodedId’ => ‘4545NV’, ‘DISPLAYNAME’
=> «Дэн»,) …