Currently I am kinda stuck with this problem.
Here is a quick introduction.
I have 1 AWS EKS where vault is stored, everything works fine, I have the UI exposed HTTPS, API works, all cool.
Now I need to connect another external AWS EKS cluster to be able to get access to the secrets from the vault from which I would like to use via the CSI Secrets store.
Here comes the part where I got stuck.
I made a service account same as described in the tutorials.
Multiple clusters will need to access the vault cluster.