List collections of models

Example cURL request:

curl -s \
  -H "Authorization: Bearer $REPLICATE_API_TOKEN" \
  https://api.replicate.com/v1/collections

The response will be a paginated JSON list of collection objects:

{
  "next": "null",
  "previous": null,
  "results": [
    {
      "name": "Super resolution",
      "slug": "super-resolution",
      "description": "Upscaling models that create high-quality images from low-quality images."
    }
  ]
}