The Hub: There is a token on the balcony area upstairs (grabbable from below)
Under the pillow on the couch, In the nesting doll on the shelf, and on the computer if you click the "coinbase" tab.

Columbia: There is a token you get for putting all 3 spray paint cans by the vans back left tire (blue is inside of the van, white is by the back right tire of the van, and yellow is found inside the red tool locker) One is on the table after clicking "the good stuff" 3 times. One is inside of the trophy on top of the self across from the driver side door, and the last is found inside of the hotwiring puzzle if you connect the blue wire to the black wire.

Japan: One is found on the backside of the nuke, One is covering a dial in front of the pilot, one is on one of the knobs on the radio, and lastly one can be found by moving the slider on the map table to cover the S and then click on the $.

England: One is found on the backside of the deatheaters mask, one is found inside a chest in the hedge maze (easiest to find by making it to the "none may match" gem puzzle then backtracking. One is found in the graveyard in the center of a cross, and lastly one is on the top of Cedric Diggory's head.

South Sudan: One is in the hut on the cross, One can be found by sliding the J of Jeep on the front of the car to the right, one is on the far side of the crate you can pick up across from the Jeeps left side. And the last one can be found by picking up the blue drum behind the car (findable after feeding the lions) placing it with the other drums in the hut, and then playing the drum pattern found on the cover of the green survial guide book.

Finding all of them should allow you to open the door by using its handle.

To bypass finding the tokens and delete the door: While inside the hub you can place the lamp named "Grandpa's bong?" in one of the wooden masks to the left of it, place the globe found by the cursed compass inside of Jupiter (found on the top self of the bookshelf) and then slowly pull the blue vase off of that shelf so that it falls straight down.