How to connect my external Bungeecord server to Minehut.

I have a network server and I want to connect it to minehut. I have bought their external server plan of 800 credits.
I believe I have set things up but when trying to connect it says the server is not authenticated with minecraft.net.
This is not client side as I have tested with other people and have restarted my game.

Does anyone know anything about this.