Fix Error around Arguments in Credential gateway

```
error[E0061]: this function takes 2 arguments but 3 arguments were supplied
--> src/credentialgateway.rs:131:40
|
131 | ... = ServiceDeliveranceResult::new(service_id, ret, reaso...
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ --------
| | |
| | unexpected argument of type `Vec<_>`
| help: remove the extra argument
|
```
As a developer, I need to resolve this error to run a successful cargo build. The third argument appears to be causing this issue. It could be fixed by updating `ServiceDeliveranceResult` to take 3 arguments.