public MainPage()
        {
            GetFolders();
            InitializeComponent();
        }

        private async Task GetFolders()
        {
            List<Folder> folders = await ApiManager.GetFoldersAsync();

            TabbedPage tabs = new TabbedPage();

            foreach (var f in folders)
            {
                tabs.Children.Add(new ContentPage { Title = f.title });
            }

        }