/// <summary>
/// Registers a webhook with this client. This retrieves a webhook based on the ID and token supplied.
/// </summary>
/// <param name="id">The ID of the webhook to add.</param>
/// <param name="token">The token of the webhook to add.</param>
/// <returns>The registered webhook.</returns>
public async Task <DiscordWebhook> AddWebhookAsync(ulong id, string token)
{
if (string.IsNullOrWhiteSpace(token))
{
throw new ArgumentNullException(nameof(token));
}
token = token.Trim();
if (_hooks.Any(x => x.Id == id))
{
throw new InvalidOperationException("This webhook is registered with this client.");
}
var wh = await _apiclient.GetWebhookWithTokenAsync(id, token).ConfigureAwait(false);
_hooks.Add(wh);
return(wh);
}