title: Creating scene definition against beta server gets 422 error
body: <p>I'm trying to use the Unity AR/VR Toolkit with a SVF file I've created by following the test-2legged script. My understanding from <a href="https://stackoverflow.com/questions/55802490/forge-arkit-cannot-load-model-in-unity">this</a> answer is that the script needs to be updated to use the new server (<a href="https://developer-api-beta.autodesk.io" rel="nofollow noreferrer">https://developer-api-beta.autodesk.io</a>) and a URL-safe encoded URN everywhere. I've done that, but when I try to create the scene definition (PUT /arkit/v1/${urn}/scenes/${scene}) I get a 422 with a msg of "must be a valid Bearer token for the requested resource (TK1-003)" (I've tried giving the token all scopes listed in the Forge docs).</p>
  
  <p>This works fine with the server in the non-modified test-2legged script. I'm operating on a file that's already in Forge so I'm not including the bucket, and I've experimented with including and not including the object ID; the default server (<a href="https://developer-api.autodesk.io" rel="nofollow noreferrer">https://developer-api.autodesk.io</a>) works fine with just an urn; the beta server I can't get to work no matter what I try.</p>
  
  <p>I don't see any documentation for this endpoint so I'm not sure if it's use changed between the servers. As far as I can tell, in the toolkit I can't get SVF files created against the non-beta server (I get 404's for the meshes), so I'm assuming I should be on the beta server, but I can't get it to work.</p>