Typescript with jwt passport

import { Strategy as JwtStrategy, ExtractJwt } from 'passport-jwt';
import passport from 'passport';

const opts = {};


opts.jwtFromRequest = ExtractJwt.fromAuthHeaderAsBearerToken();
opts.secretOrKey = 'Random string';

passport.use(new JwtStrategy(opts, function (jwt_payload, done) {
    UserModel.findOne({ id: jwt_payload.id }, function (err, user) {
        if (err) {
            return done(err, false);
        }
        if (user) {
            return done(null, user);
        } else {
            return done(null, false);
            // or you could create a new account
        }
    });
}));