function registerAjax(e) {
e.preventDefault();
let userData = {
    username: $("#username").val(),
    password: $("#password").val(),
};
$.ajax({
    method: "POST",
    url: kinveyBaseUrl + "user/" + kinveyAppKey + "/",
    headers: kinveyAppAuthHeaders,
    data: userData,
    success: registerSuccess,
    error: handleAjaxError
});
function registerSuccess(userInfo) {
    saveAuthInSession(userInfo);
    showInfo('User registration successful.');
}

function registerUser() {
registerAjax();