curl --request POST \
  --url https://dev.api.mufi.app/v1/products/{id}/items \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "product_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "users": [
    "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  ],
  "emails": [
    "jsmith@example.com"
  ]
}
'

{
  "items": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "created_at": "2023-11-07T05:31:56Z",
      "updated_at": "2023-11-07T05:31:56Z",
      "product_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "item_id": 123,
      "redemption_count": 123,
      "redemption_quantity": 123,
      "is_fully_redeemed": true,
      "user": {
        "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "email": "jsmith@example.com",
        "first_name": "<string>",
        "last_name": "<string>"
      },
      "product": {
        "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "name": "<string>",
        "type": "admission",
        "redemption_quantity": 123
      },
      "redeemed_at": 123
    }
  ]
}