How to login and get your list of books from the Auckland Public Library in Groovy using jsoup

aucklib.groovy

    Connection conn = Jsoup.connect("http://www.elgar.govt.nz/patroninfo")
    conn.get();
    conn.url('http://www.elgar.govt.nz/patroninfo/patform')
    conn.data('code', '')
    conn.data('pin', '')
    Document login = conn.post()
    Elements books = login.select('.patFuncTitle label a')
    books.each { Element e ->
      println e.text()
    }