从API中未获得所有数据

let APIUrl = NSURL(string:"https://api.openweathermap.org/data/2.5/weather?lat=(currentLocation.coordinate.latitude)&lon=(currentLocation.coordinate.longitude)&appid=e7b2054dc37b1f464d912c00dd309595&units=Metric%22")
    let request = URLRequest(url:APIUrl! as URL)
    let dataTask = URLSession.shared.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in

        if (error != nil) {
            print(error ?? "Error is empty.")
        } else {
            let httpResponse = response as? HTTPURLResponse
            print(httpResponse ?? "HTTP response is empty.")
        }
        guard let responseData = data else {
            print("Error: did not receive data")
            return
        }
        do {
            let weatherData = try JSONDecoder().decode(MyWeather.self, from: responseData)
            let ggtemp = weatherData.main?.temp
            print(ggtemp!, "THIS IS THE TEMP")
            DispatchQueue.main.async {
                self.tempDisplay.text = String(format: "%.1f", ggtemp!)
            }
        } catch  {
            print("解析POST on /todos响应错误")
            return
        }
    })

    dataTask.resume()
}

我想获取我的当前位置的温度。 当应用程序运行时，我得到以下结果：

<NSHTTPURLResponse: 0x28322fbe0> { URL: https://api.openweathermap.org/data/2.5/weather?lat=(currentLocation.coordinate.latitude)&lon=(currentLocation.coordinate.longitude)&appid=e7b2054dc37b1f464d912c00dd309595&units=Metric%22 } { 状态代码: 400, Headers {
    "Access-Control-Allow-Credentials" =     (
        true
    );
    "Access-Control-Allow-Methods" =     (
        "GET, POST"
    );
    "Access-Control-Allow-Origin" =     (
        "*"
    );
    Connection =     (
        "keep-alive"
    );
    "Content-Length" =     (
        78
    );
    "Content-Type" =     (
        "application/json; charset=utf-8"
    );
    Date =     (
        "Sun, 21 Oct 2018 09:57:38 GMT"
    );
    Server =     (
        openresty
    );
    "X-Cache-Key" =     (
        "/data/2.5/weather?lat=&lon=&units=Metric%22"
    );
} }
解析POST on /todos响应错误

有什么方法可以从此API中获取温度？

这是我的结构体代码：

   struct Coordinate : Decodable {
    let lat, lon : Double?
}

struct Weather : Decodable {
    var id : Int?
    var main, myDescription, icon : String?

    enum CodingKeys : String, CodingKey {
        case id = "id"
        case main = "main"
        case icon = "icon"
        case myDescription = "description"
    }
}

struct Sys : Decodable {
    let type, id : Int?
    let sunrise, sunset : Date?
    let message : Double?
    let country : String?
}

struct Main : Decodable {
    let temp : Double?
}

struct MyWeather : Decodable {
    let coord : Coordinate?
    let cod, visibility, id : Int?
    let name : String?
    let base : String?
    let weather : [Weather]?
    let sys : Sys?
    let main : Main?
    let dt : Date?

}