func USDtoEUR(_ completionHandler: @escaping (_ success: Bool, _ quotes: [String:AnyObject]?, _ error: String?) -> Void) {

    let urlString = "https://www.alphavantage.co/query?function=CURRENCY_EXCHANGE_RATE&from_currency=USD&to_currency=EUR&apikey=NP3M8LL62YJDO0YX"
        let session = URLSession.shared
        let url = URL(string: urlString)!

        let request = URLRequest(url: url)
        let task = session.dataTask(with: request, completionHandler: { data, response, error in
            if error != nil {
                completionHandler(false, nil, error!.localizedDescription)
            }
            else {
                do {
                    let result = try JSONSerialization.jsonObject(with: data!, options: JSONSerialization.ReadingOptions.allowFragments) as! NSDictionary
                    if let dictionary = result["Realtime Currency Exchange Rate"] as? [String:AnyObject]! {
                        completionHandler(true, dictionary, nil)
                    }
                    else {
                        completionHandler(false, nil, nil)
                    }
                } catch {
                    completionHandler(false, nil, "Unable to process retrieved data.")
                }
            }

        })
        task.resume()

    }

func usdQUotesRequest() {

  USDClient().USDtoEUR() { success, newQuote, error in

    if success {
        self.usdtoeurquote = newQuote
        DispatchQueue.main.async {
            self.stopActivityIndicator()
            self.Refresh.isEnabled = true
        }

    } else {
        DispatchQueue.main.async {
            self.displayAlert("Unable to Retrieve Latest Conversion Rates", message: "(error!)")
            self.stopActivityIndicator()
            self.Refresh.isEnabled = true

        }
    }
}

@IBAction func usdConversions(_ sender: Any) {

    self.displayAlert("Alert!", message: "USD Selected")

    let usdVal = (outputCurrency1.text! as NSString).floatValue

    let euroValue = usdVal * (usdtoeurquote["5. Exchange Rate"] as! Float)
    outputCurrency2.text = String(format: "%.2f", euroValue)

    let gbpVal = usdVal * (usdtogbpquote["5. Exchange Rate"] as! Float)
    outputCurrency3.text = String(format: "%.2f", gbpVal)

    let cnyVal = usdVal * (usdtocnyquote["5. Exchange Rate"] as! Float)
    outputCurrency2.text = String(format: "%.2f", cnyVal)

    let cadVal = usdVal * (usdtocadquote["5. Exchange Rate"] as! Float)
    outputCurrency2.text = String(format: "%.2f", cadVal)

    let inrVal = usdVal * (usdtoinrquote["5. Exchange Rate"] as! Float)
    outputCurrency2.text = String(format: "%.2f", inrVal)

    let sekVal = usdVal * (usdtosekquote["5. Exchange Rate"] as! Float)
    outputCurrency2.text = String(format: "%.2f", sekVal)

    let rubVal = usdVal * (usdtorubquote["5. Exchange Rate"] as! Float)
    outputCurrency2.text = String(format: "%.2f", rubVal)

    let nzdVal = usdVal * (usdtonzdquote["5. Exchange Rate"] as! Float)
    outputCurrency2.text = String(format: "%.2f", nzdVal)

}