Are you referring to this feature request? This has not made it onto the list yet.
The complexity here is not so much with the content type of the request, but more that 2 requests are required, and really the first request to get a token should be cached until it expires.
However you could do this already in PHP with a little custom task which makes the requests you need and updates the DataSet’s data.
As a side note we are working on a better way to collect feature requests and feedback, so that we have a better idea what is commonly requested and/or urgent, which we will feed into our roadmap. More on that soon.