Ошибка при создании пользователя с API Google Admin-sdk

У меня есть следующий код, который мне служит для получения такой информации, как список рассылки и т. Д. Но когда я пытаюсь создать новое письмо (пользователь), я получаю следующую ошибку, надеюсь, вы можете помочь мне, я пытался найти больше информации, но только найти старый API. Это ошибка->: http://i.stack.imgur.com/ZBoqa.png

C:\xampp\php>php -f "c:\Users\Eldelaguila77\Desktop\proyectocorreos\quickstart1.php"
Error calling POST https://www.googleapis.com/admin/directory/v1/users: (403) Insufficient Permission

И это мой код

<?php
require __DIR__ . '/vendor/autoload.php';

define('APPLICATION_NAME', 'Directory API PHP Quickstart');
define('CREDENTIALS_PATH', '~/.credentials/admin-directory_v1-php-quickstart.json');
define('CLIENT_SECRET_PATH', __DIR__ . '/client_secret1.json');
// If modifying these scopes, delete your previously saved credentials
// at ~/.credentials/admin-directory_v1-php-quickstart.json
define('SCOPES', implode(' ', array(
//Google_Service_Directory::ADMIN_DIRECTORY_USER_READONLY)
Google_Service_Directory::ADMIN_DIRECTORY_USER)
));

if (php_sapi_name() != 'cli') {
throw new Exception('This application must be run on the command line.');
}

/**
* Returns an authorized API client.
* @return Google_Client the authorized client object
*/
function getClient() {
$client = new Google_Client();
$client->setApplicationName(APPLICATION_NAME);
$client->setScopes(SCOPES);
$client->setAuthConfigFile(CLIENT_SECRET_PATH);
$client->setAccessType('offline');

// Load previously authorized credentials from a file.
$credentialsPath = expandHomeDirectory(CREDENTIALS_PATH);
if (file_exists($credentialsPath)) {
$accessToken = file_get_contents($credentialsPath);
} else {
// Request authorization from the user.
$authUrl = $client->createAuthUrl();
printf("Open the following link in your browser:\n%s\n", $authUrl);
print 'Enter verification code: ';
$authCode = trim(fgets(STDIN));

// Exchange authorization code for an access token.
$accessToken = $client->authenticate($authCode);

// Store the credentials to disk.
if(!file_exists(dirname($credentialsPath))) {
mkdir(dirname($credentialsPath), 777, true);
}
file_put_contents($credentialsPath, $accessToken);
printf("Credentials saved to %s\n", $credentialsPath);
}
$client->setAccessToken($accessToken);

// Refresh the token if it's expired.
if ($client->isAccessTokenExpired()) {
$client->refreshToken($client->getRefreshToken());
file_put_contents($credentialsPath, $client->getAccessToken());
}
return $client;
}

/**
* Expands the home directory alias '~' to the full path.
* @param string $path the path to expand.
* @return string the expanded path.
*/
function expandHomeDirectory($path) {
$homeDirectory = getenv('HOME');
if (empty($homeDirectory)) {
$homeDirectory = getenv("HOMEDRIVE") . getenv("HOMEPATH");
}
return str_replace('~', realpath($homeDirectory), $path);
}

// Get the API client and construct the service object.
$client = getClient();
$service = new Google_Service_Directory($client);

//enviar creacion de usuario
$user = new Google_Service_Directory_User();
$name = new Google_Service_Directory_UserName();
// SET THE ATTRIBUTES
$name->setGivenName('pruebanueve');
$name->setFamilyName('Testerton');
$user->setName($name);
$user->setHashFunction("MD5");
$user->setPrimaryEmail("[email protected]");
$user->setPassword(hash("md5","holamundo"));try
{
$createUserResult = $service -> users -> insert($user);
var_dump($createUserResult);
}
catch (Google_IO_Exception $gioe)
{
echo "Error in connection: ".$gioe->getMessage();
}
catch (Google_Service_Exception $gse)
{
echo $gse->getMessage();
}

//print $results;// Print the first 10 users in the domain.
/*$optParams = array(
'customer' => 'my_customer',
'maxResults' => 10,
'orderBy' => 'email',
);
$results = $service->users->listUsers($optParams);

if (count($results->getUsers()) == 0) {
print "No users found.\n";
} else {
print "Users:\n";
foreach ($results->getUsers() as $user) {
printf("%s (%s) (%s) \n", $user->getPrimaryEmail(),
$user->getName()->getFullName(),
$user->getlastLoginTime());
}
}*/
?>