I want to create separate environments for Jupyterlab users running in the Kubernetes cluster. The way I am trying to customize different environments is by environment variables (all environments are using the same Docker image)

I tried specifying something like this:

singleuser:
  defaultUrl: "/lab"
  extraEnv:
    ENV1: "val1"
    ENV2: "val2"
  profileList:
    - display_name: "Environment 1"
      kubespawner_override:
      env_keep:
        - ENV1
        - ENV2
      environment:
        ENV3: "val3"

But in this case ENV1 and ENV2 (and also other hub variables) are not populated in the spawned container. I need those variables to be populated, since they include variables populated dynamically with user authentication.

Any idea? Thanks