/// <summary>
        /// Favorite an asset.
        /// </summary>
        /// <param name="assetId">The asset to favorite</param>
        /// <param name="personId">The person that is executing the command</param>
        /// <returns></returns>
        public async Task AddToFavoritesAsync(string assetId, string personId)
        {
            try
            {
                var asset = await this.FetchAssetByIdAsync(assetId); // Cache aside this?!

                var slim     = new SlimAsset(asset);
                var favorite = new AssetFavorite
                {
                    Id       = AssetFavorite.CreateId(slim.Id, personId),
                    Asset    = slim,
                    PersonId = personId
                };

                await this.docClient.CreateDocumentAsync(peopleCollectionUri, favorite);
            }
            catch (DocumentClientException dce)
            {
                ; //debug this
            }
            catch (Exception ex)
            {
                ; //debug this.
            }
        }
 /// <summary>
 /// Un-Favorite an asset.
 /// </summary>
 /// <param name="assetId">The asset to un-favorite</param>
 /// <param name="personId">The person that is executing the command</param>
 /// <returns></returns>
 public async Task RemoveFromFavoritesAsync(string assetId, string personId)
 {
     try
     {
         var link = UriFactory.CreateDocumentUri("fs", "people", AssetFavorite.CreateId(assetId, personId));
         await this.docClient.DeleteDocumentAsync(link);
     }
     catch (DocumentClientException dce)
     {
         if (dce.StatusCode == HttpStatusCode.NotFound)
         {
             //cool, already gone?
             return;
         }
     }
     catch (Exception ex)
     {
         ; //debug this
     }
 }