Update Subscription

curl --request POST \
  --url https://api.creem.io/v1/subscriptions/{id} \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <x-api-key>' \
  --data '{
  "items": [
    {
      "id": "<string>",
      "product_id": "<string>",
      "price_id": "<string>",
      "units": 123
    }
  ],
  "update_behavior": "proration-charge"
}'

{
  "id": "<string>",
  "mode": "test",
  "object": "subscription",
  "product": {
    "id": "<string>",
    "mode": "test",
    "object": "<string>",
    "name": "<string>",
    "description": "This is a sample product description.",
    "image_url": "https://example.com/image.jpg",
    "features": [
      {
        "id": "<string>",
        "type": "<string>",
        "description": "Get access to discord server."
      }
    ],
    "price": 400,
    "currency": "EUR",
    "billing_type": "recurring",
    "billing_period": "every-month",
    "status": "<string>",
    "tax_mode": "inclusive",
    "tax_category": "saas",
    "product_url": "https://creem.io/product/prod_123123123123",
    "default_success_url": "https://example.com/?status=successful",
    "created_at": "2023-01-01T00:00:00Z",
    "updated_at": "2023-01-01T00:00:00Z"
  },
  "customer": {
    "id": "<string>",
    "mode": "test",
    "object": "<string>",
    "email": "user@example.com",
    "name": "John Doe",
    "country": "US",
    "created_at": "2023-01-01T00:00:00Z",
    "updated_at": "2023-01-01T00:00:00Z"
  },
  "items": [
    {
      "id": "<string>",
      "mode": "test",
      "object": "<string>",
      "product_id": "<string>",
      "price_id": "<string>",
      "units": 123
    }
  ],
  "collection_method": "charge_automatically",
  "status": "active",
  "last_transaction_id": "tran_3e6Z6TzvHKdsjEgXnGDEp0",
  "last_transaction": {
    "id": "<string>",
    "mode": "test",
    "object": "transaction",
    "amount": 2000,
    "amount_paid": 2000,
    "discount_amount": 2000,
    "currency": "EUR",
    "type": "<string>",
    "tax_country": "US",
    "tax_amount": 2000,
    "status": "<string>",
    "refunded_amount": 2000,
    "order": "<string>",
    "subscription": "<string>",
    "customer": "<string>",
    "description": "<string>",
    "period_start": 123,
    "period_end": 123,
    "created_at": 123
  },
  "last_transaction_date": "2024-09-12T12:34:56Z",
  "next_transaction_date": "2024-09-12T12:34:56Z",
  "current_period_start_date": "2024-09-12T12:34:56Z",
  "current_period_end_date": "2024-09-12T12:34:56Z",
  "canceled_at": "2024-09-12T12:34:56Z",
  "created_at": "2024-01-01T00:00:00Z",
  "updated_at": "2024-09-12T12:34:56Z"
}