/// <summary>
/// Used to send invalidation message for a key.
/// Shortcut for PUBLISH invalidate key.
/// </summary>
/// <param name="key"></param>
/// <returns>Task with the number of subscribers</returns>
public static Task <long> InvalidateAsync(string key)
{
Guard.NotNullOrEmpty(key, nameof(key));
EnsureConfiguration();
return(notificationBus.NotifyAsync(key));
}
