title: Spotify curL invalid client issue
body: <p>I'm following the <a href="https://leerob.io/snippets/spotify" rel="nofollow noreferrer">source here</a>, but I can't send a query with curL. I am getting an invalid client error.</p>
  <pre><code>curl -H &quot;Authorization: Basic &lt;base64 ZGQyXGNlZQY1OTUxNDc3NGJhMm.......ZTU0YDY=&gt;&quot; -d grant_type=authorization_code -d code=code -d redirect_uri=http%3A%2F%2Flocalhost:3000 https://accounts.spotify.com/api/token  
  </code></pre>
  <p>According to the source, I need to get my refresh token but somehow I couldn't.</p>
  <p>Unfortunately I couldn't do it and I would be very grateful if you could help.</p>