title: Should I return user data in an authentication endpoint using JWT?
body: <p>I implement an auth endpoint which takes an email and password and returns a JWT token.
  Inside the JWT there is a payload containing the user ID.
  Does it matter from a REST/JWT standards perspective which of these approaches I take?</p>
  <ol>
  <li>return the token and let the client request the <code>/users/user_id</code> resource on a callback with the decoded user_id and the token</li>
  <li>return the entire user object with the token from the <code>/auth</code> endpoint for the convenience of the client.</li>
  </ol>
  <p>(my question is implementation/library agnostic and about the api-design pattern)</p>