OAuth2 via Environment Variable

[rejoshed]

What happened?

I was trying to use an injected oauth2 token in an environment variable via a vault webhook and the following ProviderConfig

apiVersion: gcp.crossplane.io/v1beta1
kind: ProviderConfig
metadata:
  name: gcp-nexus
  namespace: crossplane-system
spec:
  projectID: infrastructure-terraform-prj
  credentials:
    source: Environment
    env:
      name: GCP_INFRA_CROSSPLANE_POC

Currently OAuth2 tokens are supported if the input credentials cannot be parsed as JSON.

Unfortunately when using the source: Environment method of providing creds, the data goes through a different logic path and doesn't know to use OAuth2 if the data cannot be JSON parsed.

How can we reproduce it?

Use a provider config like above and put a valid oauth token into the env var.

What environment did it happen in?

Crossplane version:

Latest of Each -- Will flesh out shortly.

• Cloud provider or hardware configuration
• Kubernetes version (use kubectl version)
• Kubernetes distribution (e.g. Tectonic, GKE, OpenShift)
• OS (e.g. from /etc/os-release)
• Kernel (e.g. uname -a)