Retrieve an existing checkout session

{
  "id": "session id, uuid format",
  "configuration": {
    "available_products": {
      "installments": [
        {
          "web_url": "https://checkout.tabby.ai/",
          "qr_code": "https://api.tabby.ai/api/v2/checkout/{id}/hpp_link_qr"
        }
      ]
    },
    "products": {
      "installments": {
        "type": "installments",
        "is_available": true
      }
    }
  },
  "payment": {
    "id": "payment id, uuid format",
    "status": "CLOSED",
    "amount": "100",
    "currency": "AED",
    "description": "test payload",
    "order": {
      "reference_id": "1001",
      "tax_amount": "0.00",
      "shipping_amount": "0.00",
      "discount_amount": "0.00",
      "items": [
        {
          "reference_id": "SKU123",
          "title": "Name of the product",
          "description": "Description of the product",
          "quantity": 1,
          "unit_price": "0.00",
          "image_url": "https://example.com/",
          "product_url": "https://example.com/",
          "gender": "Kids",
          "category": "Clothes",
          "color": "white",
          "product_material": "cotton",
          "size_type": "EU",
          "size": "M",
          "brand": "Name of the Brand"
        }
      ]
    },
    "meta": {
      "customer": "#customer-id",
      "order_id": "#1234"
    },
    "attachment": {
      "body": {
        "flight_reservation_details": {
          "itinerary": [
            {
              "departure_city": "departure_city",
              "departure_country": "departure_country",
              "arrival_city": "arrival_city",
              "arrival_country": "arrival_country",
              "carrier": "carrier",
              "class": "class"
            }
          ],
          "insurance": [
            {
              "insurance_company": "insurance_company",
              "insurance_type": "insurance_type"
            }
          ],
          "passengers": [
            {
              "full_name": "full_name",
              "first_name": "first_name",
              "last_name": "last_name",
              "dob": "2018-10-17",
              "document_type": "document_type",
              "document_id": "document_id",
              "nationality": "nationality",
              "gender": "F"
            }
          ],
          "pnr": "Trip booking number, e.g. TR9088999",
          "affiliate_name": "Name of the affiliate that originated the purchase. If none, leave blank."
        },
        "hotel_reservation_details": {
          "hotel_itinerary": [
            {
              "hotel_name": "hotel_name",
              "address": "address",
              "hotel_city": "hotel_city",
              "hotel_country": "hotel_country",
              "number_of_rooms": 1,
              "class": "class"
            }
          ],
          "insurance": [
            {
              "insurance_company": "insurance_company",
              "insurance_type": "insurance_type"
            }
          ],
          "passengers": [
            {
              "full_name": "full_name",
              "first_name": "first_name",
              "last_name": "last_name",
              "dob": "2018-10-17",
              "document_type": "document_type",
              "document_id": "document_id",
              "nationality": "nationality",
              "gender": "M"
            }
          ],
          "pnr": "TR9088999",
          "affiliate_name": "Name of the affiliate that originated the purchase. If none, leave blank."
        },
        "insurance_details": {
          "policy_details": {
            "insurance_type": "Insurance policy type",
            "insurance_start_dt": "2018-10-17",
            "insurance_end_dt": "2018-10-17",
            "insured_amount": "100",
            "car_details": {
              "manufacturer": "manufacturer",
              "model": "model",
              "year": "year"
            },
            "travel_details": {
              "departure_country": "departure_country",
              "arrival_country": "arrival_country"
            },
            "provider_name": "provider_name"
          },
          "client": {
            "first_name": "first_name",
            "last_name": "last_name",
            "document_type": "document_type",
            "full_name": "full_name",
            "dob": "2018-10-17",
            "document_id": "document_id",
            "nationality": "nationality",
            "gender": "F"
          },
          "payment_history_simple": {
            "unique_account_identifier": "unique name / id of the customer"
          }
        },
        "payment_history_full": {
          "unique_account_identifier": "unique name / id of the customer",
          "payment_option": "card",
          "number_paid_purchases": 1,
          "total_amount_paid_purchases": 1,
          "count_paid_purchases_last_month": 1,
          "amount_paid_purchases_last_month": 1,
          "max_paid_amount_for_1purchase": 1
        },
        "payment_history_simple": {
          "unique_account_identifier": "unique name / id of the customer"
        },
        "flight_points_simple": {
          "origin": {
            "air_code": "JFK",
            "city_code": "NYC"
          },
          "destination": {
            "air_code": "LAX",
            "city_code": "LAX"
          }
        },
        "marketplaces": {
          "seller_id": "57327813",
          "seller_name": "Pet Shop",
          "seller_category": "Electronics",
          "seller_website": "https://www.petshop.com",
          "seller_phone": "500000001",
          "seller_commercial_registration_number": "1012345678"
        },
        "education_details": {
          "merchant_subtype": "formal_education",
          "program": {
            "payment_tenure_months": 6,
            "months_to_completion": 9
          },
          "student_history": {
            "late_payments_count": 2,
            "avg_overdue_duration_days": 4.5,
            "observation_window_months": 12
          }
        }
      }
    }
  },
  "status": "created",
  "merchant_urls": {
    "success": "https://your-store/success",
    "cancel": "https://your-store/cancel",
    "failure": "https://your-store/failure"
  },
  "merchant": {
    "name": "Your store name"
  }
}