weather api in ios swift 5

private func processWeatherData(data: Data, completion: WeatherDataCompletion) {
    if let JSON = try? JSONSerialization.jsonObject(with: data, options: []) as AnyObject {
        completion(JSON, nil)
    } else {
        completion(nil, .InvalidResponse)
    }
}
private let dataManager = DataManager(baseURL: API.AuthenticatedBaseURL)