Swift print Apple app receipt verification

SwiftAppReceiptVerification.swift

import UIKit
import CloudKit
import XCPlayground
XCPlaygroundPage.currentPage.needsIndefiniteExecution = true

func main() {
    let filePath = Bundle.main.path(forResource: "sandboxReceipt", ofType: "")
    
    // get the contentData
    let base64 = FileManager.default.contents(atPath: filePath!)!.base64EncodedString()
    let requestContents = ["receipt-data": base64]
    guard let jsonData = try? JSONSerialization.data(withJSONObject: requestContents) else { return }
    //print(try? JSONSerialization.jsonObject(with: jsonData))
    let storeURL = URL(string: "https://sandbox.itunes.apple.com/verifyReceipt")
    var request = URLRequest(url: storeURL!)
    request.httpMethod = "POST"
    request.httpBody = jsonData
    request.addValue("application/json", forHTTPHeaderField: "Content-Type")
    print(request.)
    let task = URLSession.shared.dataTask(with: request) {
        (data, response, error) in
        if let error = error {
            print(error.localizedDescription)
            return
        }
        
        guard let data = data else {
            print("No data")
            return
        }
        
        do {
            guard let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? NSDictionary else {
                return
            }

            print(json)
            
        } catch {
            print(error.localizedDescription)
        }
    }
    task.resume()
}

main()