使用Google Analytics API获取所有帐户的用户

Question

I am having problems getting a list of users for accounts

If I put the account number in the try me page (https://developers.google.com/analytics/devguides/config/mgmt/v3/mgmtReference/management/accountUserLinks/list) it works

$client = new Google_Client();
$client->setAuthConfigFile($_SERVER['DOCUMENT_ROOT'] . '/client_secrets.json');
$client->addScope(Google_Service_Analytics::ANALYTICS_MANAGE_USERS);

$client=gaGetClient();
if (isset($_SESSION['access_token']) && $_SESSION['access_token']) {
     $client->setAccessToken($_SESSION['access_token']);
     $analytics = new Google_Service_Analytics($client);
     //this doesn't work
     $accountUserlinks=$analytics->management_accountUserLinks->listManagementAccountUserLinks('123456');
     //this works
     $man_accounts = $analytics->management_accounts->listManagementAccounts();
      $accounts = [];
      foreach ($man_accounts['items'] as $account) {
           $accounts[] = [ 'id' => $account['id'], 'name' => $account['name'] ];
           echo $account['name'] . " (" . $account['id'] . ")<br/>";
      }
}

I get this error message

Fatal error: Uncaught exception 'Google_Service_Exception' with message 'Error calling GET https://www.googleapis.com/analytics/v3/management/accounts/123456/entityUserLinks: (403) Insufficient Permission' in /home/grant/www/productaudit.hcpservices.co.uk/htdocs/current/google-api-php-client/src/Google/Http/REST.php:110 Stack trace: #0 /home/grant/www/productaudit.hcpservices.co.uk/htdocs/current/google-api-php-client/src/Google/Http/REST.php(62): Google_Http_REST::decodeHttpResponse(Object(Google_Http_Request), Object(Google_Client)) #1 [internal function]: Google_Http_REST::doExecute(Object(Google_Client), Object(Google_Http_Request)) #2 /home/grant/www/productaudit.hcpservices.co.uk/htdocs/current/google-api-php-client/src/Google/Task/Runner.php(174): call_user_func_array(Array, Array) #3 /home/grant/www/productaudit.hcpservices.co.uk/htdocs/current/google-api-php-client/src/Google/Http/REST.php(46): Google_Task_Runner->run() #4 /home/grant/www/productaudit.hcpservices.co.uk/htdocs/current/google-api-php-client/src/Goo in /home/grant/www/productaudit.hcpservices.co.uk/htdocs/current/google-api-php-client/src/Google/Http/REST.php on line 110

Can anyone think what I am doing wrong. I am thinking it is a scope issue, but I have stated my scopes

Thanks

Grant