function getToken() {

  var globalDirPath = getGlobalDirectory();
  var tokenPath = di.path.join(globalDirPath, 'token.txt');

  // The file doesn't exist
  if (!isFile(tokenPath)) {
    return null;
  }

  return di.fs.readFileSync(tokenPath, 'utf8');

}
Get registered token for uploading recordings

@return {String|Null}