title: React-router-dom access pages only from app not from url
body: <p>I'm new to react, react-router-dom and redux.</p>
  <p>I'm wondering if I can add an route that can't be acceses from url, only from application.
  Use case is that I'm tryng to build registration form page which will on succesfull registration send an verification code to email and application will redirect to page to enter that verification code.
  I was thinking of making new verification code page but that page can not be accesssed from typing it in url, it should be accesed only from application.</p>
  <p>Is that possible or should I take another aproach?</p>