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)