/// <summary>
/// Search for package IDs.
/// </summary>
/// <param name="query">
/// The search query. If <see langword="null"/>, gets default autocomplete results.
/// </param>
/// <param name="cancellationToken">A token to cancel the task.</param>
/// <returns>The package IDs that matched the query.</returns>
public virtual async Task <IReadOnlyList <string> > AutocompleteAsync(
string query = null,
CancellationToken cancellationToken = default)
{
var response = await _searchClient.AutocompleteAsync(query, cancellationToken : cancellationToken);
return(response.Data);
}