fetch option

let options = {
            'Content-Type'    : 'application/x-www-form-urlencoded',
            'X-Instagram-AJAX': headers.ajax[ 0 ],
            'X-Requested-With': 'XMLHttpRequest',
            'User-Agent'      : 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36'
        };
        headers = { ...headers.headers, ...options };
        console.log(headers);

        const config = { headers: headers };

        return await fetch(url, {
            method : 'POST',
            headers: config,
            body   : params
        }).then(function (response) {
            console.log('THEN');
            console.log(response);
            return response;
        }).catch(function (error) {
            console.log('ERROR');
            console.log(error);
        });