问带身份验证的API Swift 4调用。很简单。但是卡住了

EN

curl -v -X GET https://api.jsecoin.com/v1.7/balance/auth/0/ \
     -H "Content-Type: application/json" \
     -H "Authorization: JSE API Key"

{
 "success": 1, 
 "notification": "Your balance is 99 JSE",
 "balance": 99
 }

 func makeGetCall() {
    // Set up the URL request
    //let todoEndpoint: String = "https://jsonplaceholder.typicode.com/todos/1"


    let todoEndpoint: String = "https://api.jsecoin.com/v1.7/balance/auth/0/"

    //-H \"Content-Type: application/json\" -H \"Authorization: xxxxxxxxxxxxxxxxx\""

    guard let url = URL(string: todoEndpoint) else {
        print("Error: cannot create URL")
        return
    }
    let urlRequest = URLRequest(url: url)

    // set up the session
    let config = URLSessionConfiguration.default
    let session = URLSession(configuration: config)

    config.httpAdditionalHeaders = [
        "Content-Type": "application/json",
        "Authorization": "xxxxxxxxxxxxxxxxxxxxx"
    ]

    // make the request
    let task = session.dataTask(with: urlRequest) {
        (data, response, error) in
        // check for any errors
        guard error == nil else {
            print("error calling GET on /todos/1")
            print(error!)
            return
        }

The todo is: ["notification": API Balance Failed: User API key credentials  could not be matched, "fail": 1]