我如何将userID从PHP传递到Android(共享首选项)

我正在制作一个应用程序，与我的网站共享相同的数据库。我在整个活动期间维护登录会话，并且可以获得用户名，但是如何从正在登录的用户那里获得用户ID(PK)呢?我得到了所有的表很好地创建，我可以与应用程序和网站的数据库进行通信。请帮帮我

//PHP文件

if($_SERVER['REQUEST_METHOD']=='POST'){
    //Getting values 
    $email = $_POST['email'];
    $password = $_POST['password'];

    //Creating sql query
    $sql = "SELECT * FROM Utilizadores WHERE email='$email' AND password='$password'";
    //importing dbConnect.php script 
    require_once('connection.php');
    //executing query
    $result = mysqli_query($con,$sql);

    //fetching result
    $check = mysqli_fetch_array($result);
    //if we got some result 
    if(isset($check)){
        //displaying success 
        echo "success";
    }else{
        //displaying failure
        echo "failure";
    }
    mysqli_close($con);
}

//安卓文件

public class Config {
    //URL to our login.php file
    public static final String LOGIN_URL = "http://192.168.1.43/Teste/login.php";
    //Keys for email and password as defined in our $_POST['key'] in login.php
    public static final String KEY_EMAIL = "email";
    public static final String KEY_PASSWORD = "password";
    public static final String KEY_ID = "id_utilizador";

    //If server response is equal to this that means login is successful
    public static final String LOGIN_SUCCESS = "success";
    //Keys for Sharedpreferences
    //This would be the name of our shared preferences
    public static final String SHARED_PREF_NAME = "myloginapp";
    //This would be used to store the email of current logged in user
    public static final String EMAIL_SHARED_PREF = "email";
    //This would be used to store the id of current logged in user
    public static final String ID_SHARED_PREF = "id_utilizador";
    //We will use this to store the boolean in sharedpreference to track user is loggedin or not
    public static final String LOGGEDIN_SHARED_PREF = "loggedin";
}