src/Ovh/Dedicated/Server/ServerClient.php
public function changeBackupFTPPassword($domain)
	{
		$domain = (string)$domain;
		if (!$domain)
			throw new BadMethodCallException('Parameter $domain is missing.');
        try {
            $r = $this->post('dedicated/server/' . $domain . '/features/backupFTP/password')->send();
        } catch (\Exception $e) {
            throw new ServerException($e->getMessage(), $e->getCode(), $e);
        }
        return $r->getBody(true);
	}
public function changeBackupFTPPassword($domain)
	{
		$domain = (string)$domain;
		if (!$domain)
			throw new BadMethodCallException('Parameter $domain is missing.');
        try {
            $r = $this->post('dedicated/server/' . $domain . '/features/backupFTP/password')->send();
        } catch (\Exception $e) {
            throw new ServerException($e->getMessage(), $e->getCode(), $e);
        }
        return $r->getBody(true);
	}
delete backupFTP

@param 	$domain -> Server that this applies to

@return Task object