Improved main scene code

client/Global.gd

@@ -4,6 +4,7 @@ var camera: Camera3D
 var player: Player
 var players: PlayerManager
 var account_id: String
+var auth_token: String
 var interacting_with_ui: bool
-var instance_id := OS.get_process_id() % 4
-var username := "user%d" % instance_id
+var instance_id: int
+var username: String