public async Task FailToUnlistPackage(string apiKey = null)
{
PackageInfo packageInfo = null;
lock (ExistingPackagesLock)
{
packageInfo = Packages.LastOrDefault(p => p.HasSameOwnerAsApiKey(apiKey));
}
if (packageInfo == null)
{
packageInfo = await PackageInfo.CreateForUpload(this, GetApiKeyWithSameOwnerThatCanUpload(apiKey));
}
await packageInfo.FailToUnlist(this, apiKey);
}