code: static function loadFromJsonFile($path)
      {
          if (!file_exists($path)) {
              throw new AuthInfoLoadException("File doesn't exist: \"$path\"");
          }
  
          $str = Util::stripUtf8Bom(file_get_contents($path));
          $jsonArr = json_decode($str, true, 10);
  
          if (is_null($jsonArr)) {
              throw new AuthInfoLoadException("JSON parse error: \"$path\"");
          }
  
          return self::loadFromJson($jsonArr);
      }
docs: Loads a JSON file containing authorization information for your app. 'php authorize.php'
  in the examples directory for details about what this file should look like.
  
  @param string $path
  Path to a JSON file
  @return array
  A `list(string $accessToken, Host $host)`.
  
  @throws AuthInfoLoadException