Return the list of public data files.

GET /api/public-data/?format=api&offset=8800&username=madprime
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Cache-Control: max-age=0, no-cache, no-store, must-revalidate, private
Content-Type: application/json
Expires: Thu, 07 Aug 2025 19:31:41 GMT
Vary: Accept

{
    "count": 8767,
    "next": null,
    "previous": "https://www.openhumans.com/api/public-data/?format=api&limit=100&offset=8700&username=madprime",
    "results": []
}