Web API2 external login

web-api-external-login.js

function Login() {
    jQuery.support.cors = true;
    $.ajax({
        type: 'GET',
        url: 'api/Account/ExternalLogins?returnUrl=%2F&generateState=true',
        dataType: 'JSON',
        success: function (data) {
            var url = (data[0].Url);
            window.open(url, '_self', false);
        }
    });
}