Moodle的3.2 Web服務core_create_user

我嘗試添加新用戶可用參數使用REST Web服務的Moodle 3.2，我想自定義學生簡介thees場（phone1，department，institution）。我用這個代碼Moodle的3.2 Web服務core_create_user

$token = 'a38805c00f33023f7854d5adc720c7a7'; 
$domainname = 'http://localhost/moodle'; 
$functionname = 'core_user_create_users'; 
$restformat = 'json'; 

$user2 = new stdClass(); 
$user2->username = strtolower($rsnew['Serial']); 
$user2->password = $rsnew['pass']; 
$user2->firstname = $rsnew['Fname']; 
$user2->lastname = $rsnew['Lname']; 
$user2->email = $rsnew['Email']; 
$user2->lang = 'en'; 
$user2->auth = 'manual'; 
$user2->country = $rsnew['Country']; 
$user2->timezone = '99'; 
$user2->phone1 = $rsnew['phone']; 
$user2->department = $rsnew['dept']; 
$user2->institution = $rsnew['branch']; 
$user2->idnumber = $rsnew['grade']; 
$users = array($user2); 
$params = array('users' => $users); 
$serverurl = $domainname . '/webservice/rest/server.php'. '?wstoken=' . $token . '&wsfunction='.$functionname; 
require_once('./curl.php'); 
$curl = new curl; 

$restformat = ($restformat == 'json')?'&moodlewsrestformat=' . $restformat:''; 
$resp = $curl->post($serverurl . $restformat, $params);

，但我得到這個錯誤：

{ 
    "exception": "invalid_parameter_exception", 
    "errorcode": "invalidparameter", 
    "message": "Invalid parameter value detected", 
    "debuginfo": "users => Invalid parameter value detected: Unexpected keys (phone1, department, institution) detected in parameter array." 
}

我應該怎麼做才能解決這個問題？

來源

2017-08-09 Kareem Hashim