void DumpReco(int idxUser, UserRecoOptions options)
{
var u = _context.Users[idxUser];
var recos = _context.GetRecoMovies(u, options);
Console.WriteLine($" ========== User n°{idxUser} - {options} ==========");
foreach (var r in recos)
{
Console.WriteLine($"{r.Movie.MovieId} - [{string.Join( ", ", r.Movie.Categories )}] - {r.Movie.Title} - Count: {r.Count} - Weight: {r.Weight}");
}
}
