Closed door. Andrew Station (Fallout 4)

Where to find the code for the locked door hidden in the tunnels between Andrew Station and an underground club in Boston East (or South, I don’t remember exactly). A door with a digital panel can be found in the tunnel, the door itself is inaccessible and the digital panel cannot be broken. Password required. I did not find it in the tunnel. It's very interesting what is there. Maybe someone knows?