title: How can I manage a user token between two APIs and make the requests valid?
body: <p>I have an API that manages the user's account (signin/signup). 
  And I have another API that offers other services but does not handle users yet.
  I would like to integrate the same signin/signup for these two API's.
  As would a microservice. What is the correct way to do it?</p>
  
  <p>Both API's are made using Loopback 3</p>