What feature do you want to see added?

Whenever you join the server, you can still see the player's coordinates inside of the F3 menu.
Possibly, you could make a config.yml option to teleport players to something like x:0 y:0 z:0 until they login.
When they login, the player should be teleported back to their original coordinates.

Are there any alternatives?

I have tried using other authentication plugins but none of them have it too, so why not add it and be first.

Anything else?

No response

My bad, I did not notice the line teleportUnAuthedToSpawn: in the config file. My bad!