/// <summary>
/// Connects to SignalR SongHub and subscribes to
/// PlaylistChanged and SongChanged events.
/// At the end it initializes the users playlists
/// </summary>
private async Task LoadData()
{
await _signalRService.ConnectAsync();
_signalRService.PlaylistChanged += PlaylistChanged;
_signalRService.SongChanged += SongChanged;
UserPlaylists = await _spotifyApi.GetPlaylistsAsync();
}