/**
  * @param $accountReference
  * @param $username
  * @param $password
  */
 public function __construct($accountReference, $username, $password)
 {
     parent::__construct($accountReference);
     $this->username = (string) $username;
     $this->password = (string) $password;
 }
 /**
  * @param $accountReference
  * @param $sessionId
  */
 public function __construct($accountReference, $sessionId)
 {
     parent::__construct($accountReference);
     $this->sessionId = (string) $sessionId;
 }