public ShowStatisticsPageViewModel(INavigationService navigationService,
IApiService apiService) : base(navigationService)
{
_navigationService = navigationService;
_apiService = apiService;
Title = Languages.MyStatistics;
IsRunning = false;
IsVisible = false;
Chart = new ToShowChart();
StatisticsTypes = new ObservableCollection <StatisticsType>(CombosHelper.GetStatisticsTypes());
Months = new ObservableCollection <Month>(CombosHelper.GetMonths());
}