How can I make a teleporter work if you own a badge?

For that you can use BadgeService:UserHasBadgeAsync()

First we need 2 parameters, the player user id and the badge id. We will be also using pcall()

If we have both of them we can do following:

local BadgeService = game:GetService("BadgeService") -- Get service
local TeleportService = game:GetService("TeleportService")

local function onPartTouch(otherPart) 
	local player = game.Players:GetPlayerFromCharacter(otherPart.Parent) 

	local BadgeID = 0000000 -- Change this to your badge ID
	local placeID = 8951064375

	if player then
		 local success, hasBadge = pcall(function() -- Run a pcall() to check if the user has badge or not.
			return BadgeService:UserHasBadgeAsync(player.UserId, BadgeID) -- check if user has badge and return either true or false
		end)
		
		if not success then -- check if it was not successful
			warn("Operation was not successful!") -- print a warning that it was not successful
		end
		
		if hasBadge then -- If the user has the badge
			TeleportService:Teleport(placeID,player) -- Teleport
		end
	end
end

If you have any questions, feel free to ask me! Make sure to mark this as answer if this was helpful.

-- If you want to check for multiple badges, you can do following:

local success, hasBadge = pcall(function()
		return BadgeService:UserHasBadgeAsync(player.UserId, BadgeID) and BadgeService:UserHasBadgeAsync(player.UserId, BadgeID_2) and BadgeService:UserHasBadgeAsync(player.UserId, BadgeID_3) -- And so on...
	end)