public async Task Test_AuthUploadCustomPlaylistImage()
{
string filename = @"C:\Test\PlaylistCover.jpg";
var file = File.ReadAllBytes(filename);
var result = await _client.AuthUploadCustomPlaylistImageAsync(
"1L6ECMsEDXmrp1qfH5htHZ",
file);
Assert.IsTrue(result.Success);
}