Better integration with spiffe.io

Hello,

I am wondering if a better integration with spiffe.io and spire more specifically is studied or would be accepted for the Hashicorp products ?

Vault has the JWT auth method that would work with Spire, but on the client side the JWT could be retrieved from the spire api instead of the local path on disk.

This would require few additions on all client applications like vault agent, vault proxy and consult-template. But the benefit would be significant since setup with Spire would not have transiting tokens available on disk, increasing security.