title: What's the difference between mongoose save and passport-local-mongoose register()?
body: <p>What's the difference between mongoose <code>.save()</code> and passport-local-mongoose <code>.register()</code>?</p>
  <p>Why does passport-local-mongoose <code>.register()</code> require the <code>username</code> and <code>password</code> only? Can't it get email or address?</p>