- [Breaking change for Go client library] Mark `products`, `required_if_supported_products`, `optional_products`, `additional_consented_products`, and `user.ssn` as nullable in `/link/token/create` request.
- Set `minLength` for `client_name`, `language`, `access_token`, and `user.client_user_id` in `/link/token/create` request, to match actual validation behavior of the API.