Getting the top card from a Trello list in Javascript

Question

I am trying to get the top card from a list using Javascript. I saw another post on this but the code was outdated / no longer working.

I have a Trello list, called "Flights" and I would appreciate if someone could help me with this. Simply, I want to get the top card in a Trello list, along with the custom fields of the card.

So far, I have tried the following code:

 // Getting all lists from a certain board.
        fetch(`https://api.trello.com/1/boards/0Ph2WHXQ/lists?key=5fe33d73bded56ada14decf701da0203&token=e353cb19fabc8dfbea36e1b824a92ff0b358860b1de2d11c745f6e8321edfc09`, {
            method: 'GET',
        }).then(response => {
            console.log(response)
            let lists = JSON.parse(response.body);
            // Searching for a list with a certain name and store it's id.
            let certainListId = lists.find(list => list.name === "Flights").id;

            // Use the stored id in certainListId to get all cards of the list.
            fetch(`https://api.trello.com/1/lists/${certainListId}/cards`, {
                method: 'GET'
            }).then(response => {

                let certainListCards = JSON.parse(response.body);
                // Cards in the array is in top to bottom order. So top one is the very first.
                let firstCard = certainListCards[0];

                console.log(firstCard)

                // Send with the bot the name of the first (top) card thanks to firstCard.name property.

            }).catch(err => console.error(err));

        }).catch(err => console.error(err));

However, I get the following error message:

The error is on the line:

let lists = JSON.parse(response.body);

I have tried the code without the JSON.parse, but I have an error "Typeerror: lists.find is not a function"

I assume I need the parse code, but I have zero idea why it's not working. I have attached an image of just printing the response.body to the console.

Image:

Thank you for reading this, and I would highly appreciate some help. I am using node.js (latest version), using the cross-fetch module for the 'fetch' command. I am just requiring it as

const fetch = require("cross-fetch");

I highly doubt that would cause any issues, but feel free to enlighten me. Thanks again!