/// <param name='operations'>
/// The operations group for this extension method.
/// </param>
/// <param name='category'>
/// </param>
/// <param name='collection'>
/// </param>
/// <param name='key'>
/// </param>
/// <param name='model'>
/// </param>
/// <param name='cancellationToken'>
/// The cancellation token.
/// </param>
public static async Task AddAsync(this IMetadata operations, string category, string collection, string key,
MetadataModel model = default, CancellationToken cancellationToken = default)
{
await operations.RefitClient.Create(category, collection, key, model.ToChestContract());
}