Fallout 76 has had a rough time since its release, and with news that players have been able to uncover a secret "developer room" that was left in the game makes things easier.
The existence of the room was made known on Reddit earlier this week. The only gained traction from there once players discovered that you could grab unreleased items, top-tier weapons, and plans for every item in the game from the room. There is also a level 1 human NPC, named Wooby, hanging out of the room, as well.
How you access the room is exactly made clear, but it presumably includes the use of mods or the editing of game files. See, there is no console to bring you in game that you would use to make things like ghosting or teleporting (as in Fallout 4 or Skyrim which have their own secret dev rooms), The aforementioned hypotheses are also the most likely route.
Also, if you're thinking of doing it, don't. Bethesda has already caught wind of players doing it, and have started issuing bans to those who have managed to get into the room.
Fallout 76 is currently available for PC, Xbox One, and PlayStation 4.