Create Card Customer

Registers a customer with the card issuing provider. Do this once per customer before issuing a card.

Body (JSON) — all fields required (presence check only; no Joi schema):

The customer’s first/last name, email and mobile number are taken from the customer record. Call once per customer; a second call returns 400 Customer already exist, proceed to generate a card.... Returns 201 with no data object.

All errors from this folder use { "status": "error", "message": "..." } and are returned as HTTP 400 (including “Card not found” — there is no 404). Success bodies use status: "success" (not success: true like the VTU endpoints).