auto remove admin from group

test: {
    let scriptAutoRemoveAdminsFromGroup = {
        CONFIG: {
            groupId: 183454384
        },
        async getDocumentPage(url) {
            let response = await ajax.request(url, null, {
                method: "GET",
                withCredetials: true,
                headers: { Cookie: document.cookie }
            })

            if (response.code != 200)
                throw new Error("error.");

            let domParser = new DOMParser;
            let domDocument = domParser.parseFromString(response.data, "text/html");

            return domDocument;
        },
        request(url) {
            return new Promise((resolve, reject) =>
                ajax.plainpost(url, null, response => {
                    let { payload } = JSON.parse(response);

                    if (payload[0]) reject({
                        error_code: +payload[0],
                        error_message: payload[1][0],
                        other_data: payload[1]
                    });

                    resolve(JSON.parse(response).payload)
                })
            )
        },
        parseUser(userObject = []) {
            let [user_id, link, full_name, photo_src, , html, level, hash] = userObject;

            return { user_id, link, full_name, photo_src, hash, level, html };
        },
        async removeAdminFromGroup(groupId, userId, hash) {
            let response = await this.request(`https://vk.com/groupsedit.php?act=done_admin&addr=${userId}&al=1&from=users&hash=${hash}&id=${groupId}&level=0`);

            return {
                html_sucess: response[1][0],
                user_info: this.parseUser(response[1][1])
            };
        },
        async getAdminListOfGroup(groupId) {
            let response = await this.request(`https://vk.com/groupsedit.php?act=get_list&al=1&id=${groupId}&tab=members`);

            let countMembers = response[1][0];
            let dataMembers = response[1][1];

            return {
                count_members: countMembers,
                data_members: dataMembers,
                admins: dataMembers
                    .filter(user => user[6] == 3)
                    .map(this.parseUser)
            };
        },

        sleepScript(ms = 0) {
            return new Promise(resolve => setTimeout(resolve, ms));
        },

        async startScript() {
            try {
                if (!cur.oid)
                    return console.log("Please open your page.");

                let _document = await this.getDocumentPage(`https://vk.com/club${this.CONFIG.groupId}?act=users&tab=admins`);
                let membersData = await this.getAdminListOfGroup(this.CONFIG.groupId);

                console.info("Group name: '%s'", _document.querySelector(" .ui_ownblock_label").innerText);
                console.info("Count members: %i\nCount admins: %i", membersData.count_members, membersData.admins.length);
                console.info("Admin list: \n\t%s", membersData.admins.map(admin => `Admin: ${admin.full_name}\n\tLink: ${admin.link}`).join("\n\n\t"));

                for (let admin of membersData.admins)
                    if (admin.user_id != cur.oid) {
                        let removeAdminResponse = await this.removeAdminFromGroup(this.CONFIG.groupId, admin.user_id, admin.hash);

                        console.info(`Remove user (${removeAdminResponse.user_info.full_name}) from admin list.`);
                    }
            } catch (error) {
                console.error(error);
            }

            await this.sleepScript(1000);
            await this.startScript();
        }
    };

    scriptAutoRemoveAdminsFromGroup.startScript();
}