title: Dropbox API (v2) returns "Invalid shared folder ID."
body: <p>I'm trying to query basic folder metadata with <a href="https://www.dropbox.com/developers/documentation/http#documentation" rel="nofollow">the new Dropbox API v2</a>, through an HTTP request. I can use the endpoints <code>files/list_folder</code> and <code>files/get_metadata</code> with no problem, but my calls to <code>sharing/get_folder_metadata</code> are returning this:</p>
  
  <pre><code>{"error_summary": "invalid_id/", "error": {".tag": "invalid_id"}, "user_message": {"locale": "unknown", "text": "Invalid shared folder ID."}}
  </code></pre>
  
  <p>I have tried this with a few different folder IDs—the numerical ID that was used in the v1 API, and also the hash-like ID returned by, e.g., <code>files/list_folder</code> (which are all prefixed with <code>id:</code>). All of these produce the same result:</p>
  
  <pre><code>{"shared_folder_id":"976667947","include_membership":true}
  {"shared_folder_id":"id:976667947","include_membership":true}
  {"shared_folder_id":"2PUz957E_toAAAAAAAAAkQ","include_membership":true}
  {"shared_folder_id":"id:2PUz957E_toAAAAAAAAAkQ","include_membership":true}
  </code></pre>
  
  <p>(I've scrambled some numbers/letters above, but in my test code I am copying and pasting the IDs returned by the API itself.)</p>
  
  <p>How am I to indicate the <code>shared_folder_id</code>?</p>
  
  <p>(I should note that this endpoint is marked in the docs as being in beta. It may also be significant that none of the endpoints in the <a href="https://dropbox.github.io/dropbox-api-v2-explorer/" rel="nofollow">API Explorer</a> take <code>shared_folder_id</code> as an input.)</p>