gistfile1.js

// Perform the AJAX request (make sure you've set the access token  
var request = $.ajax({
    url: "/api/v2/admin/sites/current/tokens",
    type: "DELETE",
    headers: {
        "Authorization": access_token
    },
    contentType: "application/json",
}); // Request successful, response is in "msg" variable  
request.done(function (msg) {
    console.log("Successfully logged out");
}); // Request failed, you can add your own error handling  
request.fail(function (jqXHR) {
    console.log("Request failed. Error code: " + jqXHR.status);
});