Retrieve the default card for a user.\n\nAuthentication Required: Public Key or API Key\n- Requires X-Public-Key: <public_key>
header OR X-API-Key: <api_key>
header\n- Public key identifies the merchant but provides limited access\n- API key provides full access\n\nAdditional Requirements:\n- X-User-Id
header required\n\nUse Case: Get the user’s default card for payment processing
Internal use only
End-user identifier within a customer organization. Required for user-scoped operations.
Default card retrieved successfully
Response model for card details (no sensitive data).