new captif portal authentification

[facte]

hello everybody

i am looking for new aut methode new user should be able to connecte with their email which is gonna be stored in database with their ip and mac adresse

 i started changing the portal to ad him somes new form for imail input and checkbox but i can't find the the post precess script that take data store them and grant access
 
it's supposed to be a php file i think but i can't find him

and in the portal's html file it s wroten that the data are send using post metod of ajax to an url and ot not a file

Code: [Select]

$("#signin_anon").click(function (event) {
                    event.preventDefault();
                    // hide alerts
                    $("#alertMSG").addClass("hidden");
                    // try to login
                    $.ajax({
                        type: "POST",
                        url: "/api/captiveportal/access/logon/" + zoneid + "/",
                        dataType:"json",
                        data:{ user: '', password: '' }
                    }).done(function(data) {
                        // redirect on successful login
                        if (data['clientState'] == 'AUTHORIZED') {
                            if (getURLparams()['redirurl'] != undefined) {
                                window.location = 'http://'+getURLparams()['redirurl']+'?refresh';
                            } else {
                                window.location.reload();
                            }
                        } else {
                            $("#inputUsername").val("");
                            $("#inputPassword").val("");
                            $("#errorMSGtext").html("login failed");
                            $("#alertMSG").removeClass("hidden");
                        }
                    }).fail(function(){
                        $("#errorMSGtext").html("unable to connect to authentication server");
                        $("#alertMSG").removeClass("hidden");
                    });
                });
please can you help me to find that file or explain me how it work to modify post form script

thanks