[Snippet rust]
```rust
fn get_authentication(
```
Path: hyperswitch/crates/router/src/core/payments.rs :: get_authentication (function, crate=router)

Negatives:
- hyperswitch/crates/router/tests/connectors/juspaythreedsserver.rs :: should_fail_for_refund_amount_higher_than_payment_amount
- hyperswitch/crates/hyperswitch_connectors/src/connectors/stripebilling/transformers.rs :: from
- hyperswitch/crates/api_models/src/conditional_configs.rs :: get_api_event_type
- hyperswitch/crates/hyperswitch_connectors/src/connectors/bamboraapac.rs :: get_url
- hyperswitch/crates/storage_impl/src/redis/cache.rs :: exists