Create webhook for KYC/KYB events

Create a webhook to receive KYC or KYB evaluation events.

There are two types of account holder webhooks:

• verification: Webhook sent when the status of a KYC or KYB evaluation changes from PENDING_DOCUMENT (KYC) or PENDING (KYB) to ACCEPTED or REJECTED.
• document_upload_front/document_upload_back: Webhook sent when a document upload fails.

After a webhook has been created, this endpoint can be used to rotate a webhooks HMAC token or modify the registered URL. Only a single webhook is allowed per program. Since HMAC verification is available, the IP addresses from which KYC/KYB webhooks are sent are subject to change.