curl --request POST \
  --url https://api.example.com/api/v2/tenants/{tenant}/databases/{database}/collections/{collection_id}/functions/attach \
  --header 'Content-Type: application/json' \
  --header 'x-chroma-token: <api-key>' \
  --data '
{
  "function_id": "1e30d217-3d78-4f8c-b244-79381dc6a254",
  "name": "my_function",
  "output_collection": "output_collection_name",
  "params": {}
}
'

{
  "attached_function": {
    "function_name": "<string>",
    "id": "<string>",
    "name": "<string>"
  },
  "created": true
}