code: private static Identity parse(final JsonObject json) {
          final String fname = "firstName";
          final String lname = "lastName";
          final String unknown = "?";
          final Map<String, String> props = new HashMap<>(json.size());
          props.put(fname, json.getString(fname, unknown));
          props.put(lname, json.getString(lname, unknown));
          return new Identity.Simple(
              String.format("urn:linkedin:%s", json.getString("id")), props
          );
      }
docs: Make identity from JSON object.
  @param json JSON received from Github
  @return Identity found