Any way to do this?

I want to run a whitelisted network were players spawn right were they left the game.

I know bungeecord has an option to do this (just set default spawn to false) but in order to have the network whitelisted (and still not have to deal with MySQL) my idea is to whitelist the lobby server.

The goal I am trying to achieve is this:

Player joins the lobby (always as default) just to be autenticated by the whitelist, then he goes trough a portal that will teleport him to the exact location were...

Any way to do this?