问账号链接失败

EN

var redirect_uri = getUrlParameter('redirect_uri');
        console.log(redirect_uri);
        var account_linking_token = getUrlParameter('account_linking_token');
        console.log(account_linking_token);

var getUrlParameter = function getUrlParameter(sParam) {
        var sPageURL = decodeURIComponent(window.location.search.substring(1)),
            sURLVariables = sPageURL.split('&'),
            sParameterName,
            i;

        for (i = 0; i < sURLVariables.length; i++) {
            sParameterName = sURLVariables[i].split('=');

            if (sParameterName[0] === sParam) {
                return sParameterName[1] === undefined ? true : sParameterName[1];
            }
        }
    };

 var r2 = redirect_uri + "=" + account_linking_token + "&authorization_code=" + response.message;