How do I set a time to live / expiration property on a MongoDB document using Schema Models

Question

When I create a new "BlacklistedToken" document, I want it to be automatically deleted from my mongoDB database after lets say 1 day. So exactly 24 hours from after it has been created and added to the database, I want it automatically deleted.

I know there is something called TTL and I have seen examples of expiration dates being set for documents, but I never understood how to implement it with my code below.

const mongoose = require("mongoose");

const UserSchema = new mongoose.Schema({
  token: {type: String, required: true, unique: true}
}, {timestamps: true});

module.exports = mongoose.model("BlacklistedToken", UserSchema);

const newBLT = new BlacklistedToken(
  { token: req.cookies.cookieJWT }
);
await newBLT.save();

Bonus question: What I am blacklisting is a JWT accesstoken. The tokens expires 24 hours after creation, and they are also stored in a httpOnly cookie which also expires in 24 hours. Now when I want to blacklist the token, is it possible to get the remaining time till the cookie expires and use that time as the TTL property when I create the new BlacklistedToken document?

TTL = req.cookies.cookieJWT.timeTilItExpires; // something like that