Kedro

I'm back! Another question on using APIDataSet (which is now my child class that just casts auth to a tuple if its iterable).

I want to do this in my `catalog.yml`:
```yaml
api:
  type: MyAPIDataSet
  url: ...
  auth: 
    - ${username}
    - ${password}
```

where my credentials has:
```yaml
username: me
password: my_password
```

I also tried:
`catalog.yml`
```yaml
api:
  type: MyAPIDataSet
  url: ...
  auth: my_auth
```

`credentials.yml`
```yaml
my_auth:
  - me
  - my_password
```

Am I not understanding how `credentials.yml` is supposed to work? Or is it just wonky when working with APIDataSet?