Vault power comes in its rich integration. Exampme, it can authenticate using K8S JWT, or AWS IAM. Using K8S JWT, the process of generation token is gone, you

Vault power comes in its rich integration. Exampme, it can authenticate using K8S JWT, or AWS IAM. Using K8S JWT, the process of generation token is gone, you use the token from k8s. Send it to Vault. If you just look for something like a key-value store for env var and authorized using simple username/password pair then KMS or any key-value store with a HTTP on top of it will work.