The Wookiee captain has said, in effect, "Greetings! Please kindly speak your ID code or be blasted from the sky."
...oh. Just to clarify, is this the warship that has followed us or the Resistance? I'm pretty sure that it's the warship, but just wondering...
This is the ship you're supposed to be rendezvousing with. Go ahead and make up a code...it can be an alphanumeric cipher, a secret passphrase, whatever you like
Just giving y'all a little story-writing power.