Error Codes

Code	Description
webhook.notFound	No webhook with the specified ID was found.
webhook.url.required	The webhook URL was not included in the request.
webhook.url.invalid	The specified webhook URL is not valid.
webhook.username.required	The webhook username was not included in the request.
webhook.password.required	The webhook password was not included in the request.
webhook.exists	Your account already has a configured webhook. The API doesn't support creating multiple webhooks.
webhook.id.required	The webhook ID was not included in the request.