如何在swift 4中无库的api中发送Authorization类型的持有者Token？

import Foundation

func sendRequestWithToken() {
    // 设置请求URL
    let url = URL(string: "https://example.com/api/endpoint")!
    
    // 创建请求对象
    var request = URLRequest(url: url)
    
    // 设置请求方法
    request.httpMethod = "GET"
    
    // 设置Authorization头部字段
    let token = "your_token_here"
    request.setValue("Bearer \(token)", forHTTPHeaderField: "Authorization")
    
    // 创建URLSession对象
    let session = URLSession.shared
    
    // 发送请求
    let task = session.dataTask(with: request) { (data, response, error) in
        if let error = error {
            print("请求失败：\(error.localizedDescription)")
            return
        }
        
        // 处理响应数据
        if let data = data {
            let responseString = String(data: data, encoding: .utf8)
            print("响应数据：\(responseString ?? "")")
        }
    }
    
    task.resume()
}

// 调用函数发送请求
sendRequestWithToken()