title: get access token with access token?
body: <p>From what I understand so far about access token is that in Code flow, Client could get access token with either authorization code or refresh token.</p>
  <p>But.. can it get new access token with access token it holds before the token's expired?</p>
  <p>I read <a href="https://datatracker.ietf.org/doc/html/rfc6749" rel="nofollow noreferrer">RFC6749</a>(1.1 ~ 1.4, 4.1, 4.2, 5 sections only for the sake of time) and I couldn't find such that</p>
  <blockquote>
  <p>&quot;access token must get issued by only explicit resource owner's grant or refresh token&quot;</p>
  </blockquote>
  <p>So I've been thinking..</p>
  <p>How about issuing access token with access token.</p>
  <p>What's wrong with this?</p>
  <p>I'm almost noob to OAuth and learned it with only internet so I  might totally misunderstand something D:</p>
  <p>please enlighten me.. thanks!</p>