try {
String token = Files.exists(this.tokenPath) ? FileUtils.readFileToString(this.tokenPath.toFile()) : null;
DbxAppInfo appInfo = new DbxAppInfo(dropboxOptions.getAppKey(), dropboxOptions.getAppSecret());
DbxRequestConfig config = new DbxRequestConfig("Cloudsync/1.0", Locale.getDefault().toString());
DbxWebAuthNoRedirect webAuth = new DbxWebAuthNoRedirect(config, appInfo);
if (StringUtils.isEmpty(token)) {