Support for api tokens

[Eliastisys]

Hello,

We are interested in using the new api token feature for all api calls.

Noticed that the csi driver doesn't have support for it yet, it would need to use a newer version of the go client than from github.com/UpCloudLtd/upcloud-go-api/v8 v8.6.1.

While looking at this I also noted some other very old dependencies in go.mod like k8s.io/client-go v0.26.1 (EOL 28 Feb 2024)

[samir-haliru]

Thanks for the report! Yes, the CSI driver currently only supports username/password (flags + Secret keys), and doesn’t yet wire in API token auth.

Adding token support should be straightforward: introduce an optional apiToken config/Secret key and use it when present, while keeping username/password for backwards compatibility.

If you have a preferred Secret key name/format for Kubernetes, please share it - otherwise we'll propose one and documet it. We'll also handle the Go/K8s dependency bumps separately to keep this change focused.

[Eliastisys]

Sounds good, thanks. No naming preference from our side.