code: private Identity identity(final String tkn) throws IOException {
          return parse(
              this.user
                  .uri()
                  .set(
                      URI.create(
                          new Href(PsTwitter.VERIFY_URL)
                              .with(PsTwitter.ACCESS_TOKEN, tkn)
                              .toString()
                      )
                  )
                  .back()
                  .header("accept", "application/json")
                  .fetch().as(RestResponse.class)
                  .assertStatus(HttpURLConnection.HTTP_OK)
                  .as(JsonResponse.class)
                  .json()
                  .readObject()
          );
      }
docs: Get user name from Twitter, with the token provided.
  @param tkn Twitter access token
  @return The user found in Twitter
  @throws IOException If fails