override func viewDidLoad() {
    super.viewDidLoad()


    self.finalEmail = UserDefaults.standard.value(forKey: "username") as? String ?? ""
    self.finalPassword = UserDefaults.standard.value(forKey: "password") as?  String ?? ""

    threshold.delegate = self


    setChartValues()

}


func setChartValues(_ count : Int = 20) {
    let values = (0..<count).map { (i) -> ChartDataEntry in
        let val = Double(arc4random_uniform(UInt32(count)) + 3)
        return ChartDataEntry(x: Double(i), y: val)
    }

    let set1 = LineChartDataSet(values: values, label: "DataSet 1")
    let data = LineChartData(dataSet: set1)

    self.lineChartView.data = data

}