i worked on whitelist system for my game it loging to account using cookies and

roblox game send that on my railway server ( but i get 502 bad gateaway )

here the code in main roblox game :

_____

local url = "https://whitelist-production-646a.up.railway.app/getModel/:modelId"

local function getModelFromServer(modelId)

local fullUrl = url:gsub(":modelId", tostring(modelId))

local success, response = pcall(function()

return HttpService:GetAsync(fullUrl)

end)

if success then

local data = HttpService:JSONDecode(response)

local modelUrl = data.modelUrl

if modelUrl then

print("Model WhiteListed: " .. modelUrl)

else

print("notfound")

end

else

print("error " .. response)

end

end

getModelFromServer(16538048139)

also if need here the main script :

______

const express = require("express");

const noblox = require("noblox.js");

const app = express();

const PORT = 3000;

const ROBLOX_COOKIE = " ";

async function startApp() {

try {

const currentUser = await noblox.setCookie(ROBLOX_COOKIE);

console.log(`Увійшли як: ${currentUser.UserName}`);

} catch (error) {

console.error(error);

}

}

app.get("/getModel/:modelId", async (req, res) => {

try {

const modelId = req.params.modelId;

const modelUrl = https://www.roblox.com/asset/?id=${modelId};

res.json({ modelUrl: modelUrl });

} catch (error) {

res.status(500).json({ error: "failed" });

}

});

app.listen(PORT, () => {

console.log(`Сервер працює на порту ${PORT}`);

startApp();

});