Create contact with PHP

create_contact.php

<?php
//Wild Apricot API helper class
class WaApiClient {
   const AUTH_URL = 'https://oauth.wildapricot.org/auth/token';
		 
   private $tokenScope = 'auto';
   private static $_instance;
   private $token;
   
   public function initTokenByContactCredentials($userName, $password, $scope = null) {
	  if ($scope) {
		 $this->tokenScope = $scope;
	  }
	  $this->token = $this->getAuthTokenByAdminCredentials($userName, $password);
	  if (!$this->token) {
		 throw new Exception('Unable to get authorization token.');
	  }
   }
   
   public function initTokenByApiKey($apiKey, $scope = null) {
	  if ($scope) {
		 $this->tokenScope = $scope;
	  }
	  $this->token = $this->getAuthTokenByApiKey($apiKey);
	  if (!$this->token) {
		 throw new Exception('Unable to get authorization token.');
	  }
   }
   
   // this function makes authenticated request to API
   // -----------------------
   // $url is an absolute URL
   // $verb is an optional parameter.
   // Use 'GET' to retrieve data,
   //     'POST' to create new record
   //     'PUT' to update existing record
   //     'DELETE' to remove record
   // $data is an optional parameter - data to sent to server. Pass this parameter with 'POST' or 'PUT' requests.
   // ------------------------
   // returns object decoded from response json
   public function makeRequest($url, $verb = 'GET', $data = null) {
	  if (!$this->token) {
		 throw new Exception('Access token is not initialized. Call initTokenByApiKey or initTokenByContactCredentials before performing requests.');
	  }
	  $ch = curl_init();
	  $headers = array(
		 'Authorization: Bearer ' . $this->token,
		 'Content-Type: application/json'
	  );
	  curl_setopt($ch, CURLOPT_URL, $url);
	  
	  if ($data) {
		 $jsonData = json_encode($data);
		 curl_setopt($ch, CURLOPT_POSTFIELDS, $jsonData);
		 $headers = array_merge($headers, array('Content-Length: '.strlen($jsonData)));
	  }
	  curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
	  curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $verb);
	  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	  $jsonResult = curl_exec($ch);
	  if ($jsonResult === false) {
		 throw new Exception(curl_errno($ch) . ': ' . curl_error($ch));
	  }
	  // var_dump($jsonResult); // Uncomment line to debug response
	  curl_close($ch);
	  return json_decode($jsonResult, true);
   }
   
   private function getAuthTokenByAdminCredentials($login, $password) {
	  if ($login == '') {
		 throw new Exception('login is empty');
	  }
	  $data = sprintf("grant_type=%s&username=%s&password=%s&scope=%s", 'password', urlencode($login), urlencode($password), urlencode($this->tokenScope));
	  throw new Exception('Change clientId and clientSecret to values specific for your authorized application. For details see:  https://help.wildapricot.com/display/DOC/Authorizing+external+applications');
	  $clientId = 'SamplePhpApplication';
	  $clientSecret = 'open_wa_api_client';
	  $authorizationHeader = "Authorization: Basic " . base64_encode( $clientId . ":" . $clientSecret);
	  return $this->getAuthToken($data, $authorizationHeader);
   }
   
   private function getAuthTokenByApiKey($apiKey) {
	  $data = sprintf("grant_type=%s&scope=%s", 'client_credentials', $this->tokenScope);
	  $authorizationHeader = "Authorization: Basic " . base64_encode("APIKEY:" . $apiKey);
	  return $this->getAuthToken($data, $authorizationHeader);
   }
   
   private function getAuthToken($data, $authorizationHeader) {
	  $ch = curl_init();
	  $headers = array(
		 $authorizationHeader,
		 'Content-Length: ' . strlen($data)
	  );
	  curl_setopt($ch, CURLOPT_URL, WaApiClient::AUTH_URL);
	  curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
	  curl_setopt($ch, CURLOPT_POST, true);
	  curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
	  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	  $response = curl_exec($ch);
	  if ($response === false) {
		 throw new Exception(curl_errno($ch) . ': ' . curl_error($ch));
	  }
	  // var_dump($response); // Uncomment line to debug response	
	  
	  $result = json_decode($response , true);
	  curl_close($ch);
	  return $result['access_token'];
   }
   
   public static function getInstance() {
	  if (!is_object(self::$_instance)) {
		 self::$_instance = new self();
	  }
	  return self::$_instance;
   }
   
   public final function __clone() {
	  throw new Exception('It\'s impossible to clone singleton "' . __CLASS__ . '"!');
   }
   
   private function __construct() {
	  if (!extension_loaded('curl')) {
		 throw new Exception('cURL library is not loaded');
	  }
   }
   
   public function __destruct() {
	  $this->token = null;
   }
}




function generateRandomString($length=32) {
    return substr(md5(uniqid(mt_rand(), true)), 0, $length);
}

function getWaAccountDetails () {
   global $waApiClient;
   $url = 'https://api.wildapricot.org/v2/Accounts/';
   $response = $waApiClient->makeRequest($url); 
   return  $response[0]; // usually you have access to one account
}
 
function createWaContact($postFields) {
	global $waApiClient;
	global $waAccountUrl;
	
	$url = $waAccountUrl . '/Contacts/';
	$data = array(
		'FirstName' => $postFields['firstName'],
		'LastName' => $postFields['lastName'],
		'Password' => $postFields['password'],
		'Email' => $postFields['email'],
		'MembershipLevel' => array(
			'Id' => 838800
		),
		'MembershipEnabled' => true,
		'Status' => 'Active',
		'FieldValues' => array(
			array(
				'SystemCode' => 'RenewalDue',
				'Value' => $postFields['date']
			)
		)
	);
	return $waApiClient->makeRequest($url, 'POST', $data);
}

$password = generateRandomString(10);
$date = date("Y-m-d", strtotime('+1 year'));

//Wild Apricot Connection
$waApiClient = WaApiClient::getInstance();
$waApiKey = "rfolnz5z17dxzbt47pejw0zfr4qn11";
$waApiClient->initTokenByA