- Set the `minimum` for the `count` and `offset` fields in `InstitutionsGetRequest`
- Set `products`, `routing_numbers`, and `oauth` fields to be nullable in `InstitutionsGetRequestOptions`
- Set `products` to be nullable in `InstitutionsSearchRequest`
- Set `oauth`, `include_auth_metadata`, and `include_payment_initiation_metadata` fields to be nullable in `InstitutionsSearchRequestOptions`
- Set `payment_id` field to be nullable in `InstitutionsSearchPaymentInitiationOptions`