setrequestheader authorization bearer

var customXMLHttpRequest = (function (jwtoken) {

    function getXMLHttpRequest(method, url, async){
        var xmlHttpRequest = new XMLHttpRequest();
        xmlHttpRequest.open(method, url, async);
        xmlHttpRequest.setRequestHeader('Authorization', 'Bearer ' + jwtoken);
        return xmlHttpRequest;
    }

    return getXMLHttpRequest;
})('Your token');