<?php

if(isset($_POST['username'])){
 $username = $_POST['username'];
 $password = $_POST['password'];

 include_once '../../../koneksi.php';
 $result = $mysqli->query("SELECT * FROM user WHERE username = 'adnin'");

 while($row = $result->fetch_object()){
  echo $row->idUser."<br>";
 }
}

?>