[Snippet rust]
```rust
pub struct CashtocodeAuth {
    pub password_classic: Option<Secret<String>>,
    pub password_evoucher: Option<Secret<String>>,
    pub username_classic: Option<Secret<String>>,
    pub username_evoucher: Option<Secret<String>>,
    pub merchant_id_classic: Option<Secret<String>>,
    pub merchant_id_evoucher: Option<Secret<String>>,
}
```
Path: hyperswitch/crates/hyperswitch_connectors/src/connectors/cashtocode/transformers.rs :: CashtocodeAuth (struct, crate=hyperswitch_connectors)

Negatives:
- hyperswitch/crates/hyperswitch_connectors/src/connectors/fiserv/transformers.rs :: FiservReturnUrls
- hyperswitch/crates/analytics/src/payments/accumulator.rs :: RetriesAmountAccumulator
- hyperswitch/crates/hyperswitch_connectors/src/connectors/gocardless/transformers.rs :: MandateWebhookLink
- hyperswitch/crates/hyperswitch_domain_models/src/refunds.rs :: RefundListConstraints
- hyperswitch/crates/hyperswitch_connectors/src/connectors/nexixpay/transformers.rs :: NexixpayMandatePaymentRequest