index.js

const fs = require('fs');
const fetch = require('node-fetch');

fs.readFile("credentials.txt", "utf8", (err, data) => {
    var data = data.replace("\r", "").split("\n");

    var username = data[0].trim();
    var password = data[1].trim();
    var userId = data[2].trim();
    var authorization = "Bearer ";

    console.log(`Einloggen als ${username}...\n`)
    //get refresh token
    fetch("https://eu.mspapis.com/loginidentity/connect/token", {
            "headers": {
                "accept": "*/*",
                "accept-language": "en-GB,en;q=0.9,en-US;q=0.8,sv;q=0.7",
                "content-type": "application/x-www-form-urlencoded",
                "sec-ch-ua": "\"Chromium\";v=\"92\", \" Not A;Brand\";v=\"99\", \"Microsoft Edge\";v=\"92\"",
                "sec-ch-ua-mobile": "?0",
                "sec-fetch-dest": "empty",
                "sec-fetch-mode": "cors",
                "sec-fetch-site": "cross-site"
            },
            "referrer": "https://moviestarplanet2.de/",
            "referrerPolicy": "strict-origin-when-cross-origin",
            "body": `client_id=unity.client&client_secret=secret&grant_type=password&scope=openid%20nebula%20offline_access&username=DE%7c${username}&password=${password}&acr_values=gameId%3aj68d`,
            "method": "POST",
            "mode": "cors"
        }).then(res => res.json())
        .then(loginidentity => {
            if (loginidentity.error) return console.error(`Error found`, loginidentity);
            console.log(`Success! Logged in as ${username}.\n`)

            //get final bearer token
            fetch("https://eu.mspapis.com/loginidentity/connect/token", {
                    "headers": {
                        "accept": "*/*",
                        "accept-language": "en-GB,en;q=0.9",
                        "authorization": "Basic dW5pdHkuY2xpZW50OnNlY3JldA==",
                        "content-type": "application/x-www-form-urlencoded",
                        "sec-ch-ua": "\"Chromium\";v=\"92\", \" Not A;Brand\";v=\"99\", \"Microsoft Edge\";v=\"92\"",
                        "sec-ch-ua-mobile": "?0",
                        "sec-fetch-dest": "empty",
                        "sec-fetch-mode": "cors",
                        "sec-fetch-site": "cross-site"
                    },
                    "referrer": "https://moviestarplanet2.de/",
                    "referrerPolicy": "strict-origin-when-cross-origin",
                    "body": `grant_type=refresh_token&refresh_token=${loginidentity.refresh_token}&acr_values=gameId%3aj68d%20profileId%3a${userId}`,
                    "method": "POST",
                    "mode": "cors"
                }).then(res => res.json())
                .then(fullidentity => {
                    authorization += fullidentity.access_token;

                    console.log(`Authorized as ${username}\n`);

                    pet(userId, authorization);
                });
        });
});

function pet(userId, authorization) {
    var pets = [
        "4e9b00e3eaff40ac8c37dacd6feed92b",
        "223ee9a08c5a4e8fa6a7caf7e45d913c",
        "9371b18bd2a24a7cbbcaa50de1fade09",
        "966a64abd420491e95687c36fa8da929",
        "ab01942737e141b09785e116092de143",
        "fb4799e214354629af22ac0da6afc0fe",
        "8ca8113de66946d2bbb30e968d61fc44",
        "190106dc197a460c9a9fd64d39c88bd6",
        "4aff270020754ff799d8d94e9ef3a081",
        "a4899f41ea3d4850865b645bd953b074"
    ];

    var delay = 2000;

    //delay the petting
    for (let i = 0; i < 10; i++) {
        setTimeout(function () {

            //interact with the pet
            fetch(`https://eu.mspapis.com/pets/v1/pets/${pets[i]}/interactions`, {
                "headers": {
                    "accept": "*/*",
                    "accept-language": "en-GB,en;q=0.9",
                    "authorization": authorization,
                    "content-type": "application/json",
                    "sec-ch-ua": "\"Chromium\";v=\"92\", \" Not A;Brand\";v=\"99\", \"Microsoft Edge\";v=\"92\"",
                    "sec-ch-ua-mobile": "?0",
                    "sec-fetch-dest": "empty",
                    "sec-fetch-mode": "cors",
                    "sec-fetch-site": "cross-site"
                },
                "referrer": "https://moviestarplanet2.de/",
                "referrerPolicy": "strict-origin-when-cross-origin",
                "body": `{"profileId":"${userId}","gameId":"j68d"}`,
                "method": "POST",
                "mode": "cors"
            }).then(console.log(`Petted ${pets[i]}`));
        }, i * delay);
    }
};