Slider in settings to adjust days of forecast loaded. Settings are saved and loaded

lib/services/brightsky_api_service.dart

@@ -17,7 +17,8 @@ class BrightSkyAPI {
   }
 
   static Future<List<DailyWeatherModel>> fetchForecastForTimeRange(
-      DateTime from, DateTime until) async {
+      DateTime from, int noOfDays) async {
+    DateTime until = from.add(Duration(days: noOfDays));
     String fromDay = "${from.year}-${from.month}-${from.day}";
     String untilDay = "${until.year}-${until.month}-${until.day}";
     final response = await http.get(