public static function subscribeNewUser($email,$listid,$confirm = false){
    	$data = [
    			'email_address' => $email,
    			'status' => ($confirm ? 'pending' : 'subscribed'),
    	];
    	if (!empty($merge_fields)) $data['merge_fields'] = $merge_fields;
    	$action = self::$api_version.'/lists/'.$listid.'/members/';
    	 
    	return self::send($action, 'POST', $data);
    	
    }