getStringValuesSF() async {
  SharedPreferences prefs = await SharedPreferences.getInstance();
  //Return String
  String stringValue = prefs.getString('stringValue');
  return stringValue;
}
getBoolValuesSF() async {
  SharedPreferences prefs = await SharedPreferences.getInstance();
  //Return bool
  bool boolValue = prefs.getBool('boolValue');
  return boolValue;
}
getIntValuesSF() async {
  SharedPreferences prefs = await SharedPreferences.getInstance();
  //Return int
  int intValue = prefs.getInt('intValue');
  return intValue;
}
getDoubleValuesSF() async {
  SharedPreferences prefs = await SharedPreferences.getInstance();
  //Return double
  double doubleValue = prefs.getDouble('doubleValue');
  return doubleValue;
}