No support for "plugins" as far as authentication, or to elaborate a bit, how do you go about running the 'auth' component in multiple VPC and have some degree of sync? Perhaps a use case for an underlying LDAP directory, or ..?
We support OIDC connectors, so you can plug in LDAP using https://github.com/coreos/dex as one of the providers, or simply roll a new OIDC provider customized to your needs.