请求错误Google Cloud NLP API with Swift

import Foundation

func requestGoogleCloudNLPAPI() {
    let apiKey = "YOUR_API_KEY"
    let urlString = "https://language.googleapis.com/v1/documents:analyzeSentiment?key=\(apiKey)"
    
    guard let url = URL(string: urlString) else {
        print("Invalid URL")
        return
    }
    
    let document: [String: Any] = [
        "type": "PLAIN_TEXT",
        "content": "Hello, how are you?"
    ]
    
    let parameters: [String: Any] = [
        "document": document,
        "encodingType": "UTF8"
    ]
    
    let jsonData = try? JSONSerialization.data(withJSONObject: parameters)
    
    var request = URLRequest(url: url)
    request.httpMethod = "POST"
    request.httpBody = jsonData
    request.addValue("application/json", forHTTPHeaderField: "Content-Type")
    
    let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
        if let error = error {
            print("Error: \(error)")
            return
        }
        
        guard let data = data else {
            print("No data received")
            return
        }
        
        // 解析响应数据
        if let json = try? JSONSerialization.jsonObject(with: data, options: []),
           let result = json as? [String: Any] {
            print("Response: \(result)")
        } else {
            print("Invalid response")
        }
    }
    
    task.resume()
}