Cannot fetch a MongoDB collection.

Question

Whenever I call my code to fetch a MongoDB collection, it results in a 
> MongooseError: Operation `games.find()` buffering timed out after 10000ms

After a bit, this error pops up: MongooseServerSelectionError: getaddrinfo ENOTFOUND mongodb.railway.internal

Any idea why it might be? This is my code to fetch the data:

```js
import axios from "axios";
import mongoose from "mongoose";
import { MONGO_URL } from '$env/static/private'

const gameSchema = new mongoose.Schema({
    name: String
  });

export async function GET({request}) {
    console.log("GET /api/games");
    await mongoose.connect(MONGO_URL + "/test2");
    const Game = mongoose.model("Game", gameSchema);
    console.log("Connected to MongoDB");

try {
        const gameList = await Game.find({});
        console.log(gameList);

return new Response(JSON.stringify(gameList), {
            status: 200,
            headers: {
                "Content-Type": "application/json",
            },
        });
    } catch (error) {
        console.error("Error fetching games:", error);
        return new Response("Error fetching data", {
            status: 500,
            headers: {
                "Content-Type": "application/json",
            },
        });
    } finally {
        mongoose.connection.close();
    }
};
```

It does print "Connected to MongoDB" but then hangs and outputs the mentioned errors.

Any idea what might be up? Thank you.