/// <summary>
/// Rename an existing watchlist.
/// </summary>
/// <param name="userId">The unique identifier of the user who owns the watchlist.</param>
/// <param name="watchlistId">The unique identifier of the watchlist to rename.</param>
/// <param name="name">The watchlist name.</param>
public void RenameWatchlist(Guid userId, Guid watchlistId, string name)
{
Validate.NotEmpty(userId, nameof(userId));
Validate.NotEmpty(watchlistId, nameof(watchlistId));
Validate.NotNullOrWhitespace(name, nameof(name));
Watchlist watchlist = GetWatchlist(userId, watchlistId);
watchlist.RenameWatchlist(name);
_watchlistRepository.Save(watchlist);
}
