List customer subscriptions

{
  "items": [
    {
      "object": "subscription",
      "product": {
        "description": "This is a sample product description.",
        "image_url": "https://example.com/image.jpg",
        "image_urls": [
          "https://example.com/image.jpg"
        ],
        "features": [
          {
            "id": "feat_abc123",
            "description": "Access to premium course materials.",
            "customer_credits": {
              "amount": "100",
              "unit_label": "tokens",
              "bucket_name": "images"
            }
          }
        ],
        "usage_prices": [
          {
            "id": "price_abc123",
            "meter_id": "mtr_abc123",
            "unit_price": 0.002,
            "free_allowance": 1000,
            "cap": 50000,
            "target_account_name": "images"
          }
        ],
        "price": 400,
        "currency": "USD",
        "recurring_interval": "month",
        "recurring_interval_count": 3,
        "trial_period_days": 7,
        "trial_price": 100,
        "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": {
        "email": "user@example.com",
        "name": "John Doe",
        "metadata": {
          "key": "value"
        },
        "country": "US",
        "external_id": "user-42",
        "created_at": "2023-01-01T00:00:00Z",
        "updated_at": "2023-01-01T00:00:00Z"
      },
      "last_transaction_id": "tran_3e6Z6TzvHKdsjEgXnGDEp0",
      "last_transaction": {
        "object": "transaction",
        "amount": 2000,
        "amount_paid": 2000,
        "discount_amount": 2000,
        "currency": "USD",
        "tax_country": "US",
        "tax_amount": 2000,
        "refunded_amount": 2000
      },
      "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",
      "discount": {
        "id": "dis_3e6Z6TzvHKdsjEgXnGDEp0",
        "discountCode": "HOLIDAY2024"
      },
      "metadata": {
        "userId": "user_123",
        "plan": "pro"
      }
    }
  ],
  "pagination": {
    "current_page": 1,
    "next_page": 2
  }
}