public async Task <PredictionEngine <ProductInput, ProductScore> > GetEngine()
{
var modelStream = await blobStorage.DownloadBlobAsStream("recommender-model.ml", "Models");
var mlContext = new MLContext();
var model = mlContext.Model.Load(modelStream, out _);
var engine = mlContext.Model.CreatePredictionEngine <ProductInput, ProductScore>(model);
return(engine);
}