Swift Error

import UIKit
import SwiftUI
import Foundation

struct Ticker: Codable {
    let rate: Int
}

if let url = URL(string: "https://api.zonda.exchange/rest/trading/ticker/BTC-PLN") {
    URLSession.shared.dataTask(with: url) { data, response, error in
    if let data = data {
    let jsonDecoder = JSONDecoder()
    do {
    let parsedJSON = try jsonDecoder.decode(Ticker.self, from: data)
        for rate in parsedJSON.rate {
        print(rate)
                }
            } catch {
    print(error)
            }
           }
       }.resume()
}