ReferenceError: err is not defined mongoose mongodb

When I run this code, it returns an error saying that err is not defined

here is my code

app.post('/tinder/cards', (req, res) => {
const dbCard = req.body;

Cards.create(dbCard, (err, data) => {
    if (err) {
        res.status(500).send(err);
    } else {
        res.status(201).send(data);
    }
});

app.get('/tinder/cards', (req, res) => {
Cards.find(err, data => {
    if (err) {
        res.status(500).send(err);
    } else {
        res.status(200).send(data);
    }
});

Here is my definition of the MongoDB schema:

import mongoose from 'mongoose';

const cardSchema = mongoose.Schema({
    name: String,
    imgUrl: String,
});


export default mongoose.model('cards', cardSchema);

Someone, please help me fix this thank you!