Subscription List YouTube API - php

Question

Using Google APIs, I would have liked to retrieve the list of channels for which I am subscribed from my Youtube account. For that I used the following PHP library: https://packagist.org/packages/league/oauth2-client. After applying all the necessary information I get the following error: Fatal error: Uncaught UnexpectedValueException: Invalid response received from Authorization Server. Expected JSON ....
Here is my code:
<?php
require 'vendor/autoload.php';
$provider = new \League\OAuth2\Client\Provider\GenericProvider([
'clientId' => 'my_oauth_client_id', // The client ID assigned to you by the provider
'clientSecret' => 'my_oauth_client_secret', // The client password assigned to you by the provider
'redirectUri' => 'http://localhost/oauthytb/index.php',
'urlAuthorize' => 'https://accounts.google.com/o/oauth2/v2/auth',
'urlAccessToken' => 'https://oauth2.googleapis.com/token',
'urlResourceOwnerDetails' => 'https://www.googleapis.com/auth/youtube.readonly'
]);
// If we don't have an authorization code then get one
if (!isset($_GET['code'])) {
$options = [
'scope' => ['https://www.googleapis.com/auth/youtube.readonly']
];
// Fetch the authorization URL from the provider; this returns the
// urlAuthorize option and generates and applies any necessary parameters
// (e.g. state).
$authorizationUrl = $provider->getAuthorizationUrl($options);
// 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']) || (isset($_SESSION['oauth2state']) && $_GET['state'] !== $_SESSION['oauth2state'])) {
if (isset($_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 'Access Token: ' . $accessToken->getToken() . "<br>";
echo 'Refresh Token: ' . $accessToken->getRefreshToken() . "<br>";
echo 'Expired in: ' . $accessToken->getExpires() . "<br>";
echo 'Already expired? ' . ($accessToken->hasExpired() ? 'expired' : 'not expired') . "<br>";
// 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://www.googleapis.com/youtube/v3/subscriptions',
$accessToken
);
} catch (\League\OAuth2\Client\Provider\Exception\IdentityProviderException $e) {
// Failed to get the access token or user details.
exit($e->getMessage());
}
}
?>
Thank you in advance for your help

Answer 1

I finally solved the problem.
I replaced :
'urlResourceOwnerDetails' => 'https://www.googleapis.com/auth/youtube.readonly'
By :
'urlResourceOwnerDetails' => 'https://www.googleapis.com/youtube/v3/subscriptions?part=snippet%2CcontentDetails&mine=true&key=AIzaSyDay5KNU_TPCD-s_n7t6XqqrHYumUtjytI'