public async Task Test_ListArtists_Multiple()
        {
            var request = new ArtistsRequest()
            {
                ArtistType        = ArtistType.Multiple,
                MultipleArtistIds = new List <string>
                {
                    "2wY79sveU1sp5g7SokKOiI",
                    "6qqNVTkY8uBg9cP3Jd7DAH"
                }
            };
            var items = await _client.ListArtistsAsync(request);

            Assert.IsNotNull(items?.Items);
            Assert.IsTrue(items?.Items.Count > 0);
        }
        public async Task Test_ListArtists_UserFollowed()
        {
            var request = new ArtistsRequest()
            {
                ArtistType = ArtistType.UserFollowed
            };
            var items = await _client.ListArtistsAsync(request);

            Assert.IsNotNull(items?.Items);
            Assert.IsTrue(items?.Items.Count > 0);

            var more = await _client.ListArtistsAsync(items);

            Assert.IsNotNull(more?.Items);
            Assert.IsTrue(more?.Items.Count > 0);
        }