https://www.digitalocean.com/community/tutorials/how-to-access-vault-secrets-inside-of-kubernetes-using-external-secrets-operator-eso
https://github.com/external-secrets/external-secrets
https://github.com/pbchekin/vault-sync
https://github.com/zakkg3/ClusterSecret
https://stackoverflow.com/questions/46297949/sharing-secret-across-namespaces