Creates a new KYC or KYB dossier (a verification case) under one of your
verification levels, provisions the applicant and a hosted verification
session, and returns the dossier token together with the verification URL
(and, optionally, a QR code).

Choose the product with the type parameter (kyc or kyb). The level you
reference must belong to the same product family.

Sending the invite

Set send_sms and/or send_email (with a phone_number / email_address) to
have Bynn deliver the verification link to the applicant for you. Otherwise the
returned verification_url (and optional qr_base64_png) is yours to deliver.

Retrieving results later

After the applicant completes the session (see the session.completed webhook,
which returns this dossier_id), call GET /dossiers/:id to fetch the full
result including the liveness selfie and ID-document images.

Errors

• 401 authentication_error — missing, malformed, or revoked private key.
• 402 payment_required — the request could not be completed for this account.
• 404 validation_error — no matching level for the requested type.