[Snippet rust]
```rust
fn get_connector_customer_id(&self) -> Option<String> {
        self.connector_customer_id.clone()
    }
```
Path: hyperswitch/crates/router/src/core/payments.rs :: get_connector_customer_id (function, crate=router)

Negatives:
- hyperswitch/crates/router/src/services/authentication.rs :: get_and_validate_connected_merchant_id
- hyperswitch/crates/router/src/services/kafka.rs :: log_payment_intent
- hyperswitch/crates/router/src/core/api_keys.rs :: from
- hyperswitch/crates/router/src/routes/refunds.rs :: refunds_list
- hyperswitch/crates/openapi/src/routes/payment_method.rs :: payment_method_session_confirm