//Opent een playlist naar keuze met alle toebehorende nummers die daar in zitten
public IActionResult Open(int selectedPlaylistID, string selectedPlaylistName)
{
ViewBag.User = currentUser;
ViewBag.Playlist = selectedPlaylistName;
currentPlaylist = ViewBag.Playlist;
var model = playlistContainer.RetrievePlaylistSongs(selectedPlaylistID);
currentSongs = model;
return(View("PlaylistSongs", model));
}
