Postgress Plugin sslmode=fullverify + Kuberenetes pod

I am having trouble with vault hosted on an ks cluster connecting to a hosted postgress instance. I am using the plugin described here (https://www.vaultproject.io/docs/secrets/databases/postgresql.html).

My problem is this postgress instance automatically generates a tls certificate. Postgress has different values for this ssl, explained here(https://godoc.org/github.com/lib/pq#hdr-Connection_String_Parameters)

Where do i store this certificate in vault so when i use the vault plugin for postgres, it will reference that TLS cert the postgres generated?

Also is there a better walkthrough then the docs? Or is there a better place to ask these types of questions?

Any advice would be greatly appreciated!