tidak bisa login

Hallo teman2, saya mau tanya, saaya sudah berhasil register, tetapi saat login echo nya password salah.

login

<?php
  include '../koneksi/koneksi.php';
  error_reporting(0);
  session_start();

  // if(isset($_SESSION['username'])) {
  //   header ("Location: login.php");
  // }
  if(isset($_POST['submit'])) {
    $email    = $_POST['email'];
    $password = md5($_POST['password']);

    $sql    = "SELECT * FROM admin_idi WHERE email='$email' AND password='$password'";
    $result = mysqli_query($con, $sql);
    if($result->num_rows > 0) {
      $row = mysqli_fetch_assoc($result);
      $_SESSION['username'] = $row['username'];

      header("Location: ../index.php");
    } else {
      echo "<script>alert('Woopps!! Email dan Password Salah.')</script>";
    }
  }
?>

<div class="w-full">
              <h1 class="mb-4 text-xl font-semibold text-gray-700 dark:text-gray-200">
                Login - Admin IDI
              </h1>
              <form action="" method="POST">
                <div class="form-group">
              <label class="block text-sm">
                <span class="text-gray-700 dark:text-gray-400">Email</span>
                <input type="email"
                  class="block w-full mt-1 text-sm dark:border-gray-600 dark:bg-gray-700 focus:border-purple-400 focus:outline-none focus:shadow-outline-purple dark:text-gray-300 dark:focus:shadow-outline-gray form-input"
                    name="email" value="<?php echo $email; ?>">
              </label>
              <label class="block mt-4 text-sm">
                <span class="text-gray-700 dark:text-gray-400">Password</span>
                <input type="password"
                  class="block w-full mt-1 text-sm dark:border-gray-600 dark:bg-gray-700 focus:border-purple-400 focus:outline-none focus:shadow-outline-purple dark:text-gray-300 dark:focus:shadow-outline-gray form-input"
                  placeholder="****************"
                  name="password" value="<?php echo $_POST['password']; ?>">
               </label>

              <!-- You should use a button here, as the anchor is only used for the example  -->
              <button name="submit" class="block w-full px-4 py-2 mt-4 text-sm font-medium leading-5 text-center text-white transition-colors duration-150 bg-purple-600 border border-transparent rounded-lg active:bg-purple-600 hover:bg-purple-700 focus:outline-none focus:shadow-outline-purple">
                Log in
              </a>
              </button>