if (isTargetUser(username)) {
            executeCommand(deleteCommand, username, StringUtil.EMPTY);
        }
    }

    @Override
    public boolean changePassword(final String username, final String password) {
        if (isTargetUser(username) && StringUtil.isNotBlank(password)) {
            return executeCommand(updateCommand, username, password) == 0;
        }
        return true;
    }

                for (final String value : commandList) {
                    cmdList.add(expandPath(value.replace("${url}", tempPath).replace("${outputFile}", outputPath)));
                }

                executeCommand(thumbnailId, cmdList);

                if (outputFile.isFile() && outputFile.length() == 0) {
                    logger.warn("Thumbnail File is empty. ID is {}", thumbnailId);