title: Firebase 'requires-recent-login'
body: <p>I would like to know about firebase <code>requires-recent-login</code>.
  If I reauthenticate user like this </p>
  
  <pre><code>firebase.auth().currentUser.reauthenticateAndRetrieveDataWithCredential(
    firebase.auth.EmailAuthProvider.credential(firebase.auth().currentUser.email,
    typedpassword))
  </code></pre>
  
  <p>to let user change password or email, is there any possibility that <code>requires-recent-login</code> error comes out?</p>