title: Using auth0 to simultaneously connect to a legacy server and a new server
body: <p>I have a web SPA that currently connects to a Rails backend, authentication handled via auth0.  We have a new server that has some endpoints that the SPA needs to connect to.  What is an elegant way of authenticating against both servers considering I have auth0 implemented in the SPA and the legacy server already?  Is there some way to pass the authenticated token back to the new server from the legacy server?  Or do I just authenticate against both servers when logging in as a user on the SPA?  The user db sits in a separate db, shared by both servers.  </p>