undefined array key =email and password

Hi Team

I am using correct table and fields, but my back end is not working when inspect i get 200 status but the file itself login.php line 18 and 19 shows undefined array key email and password. How do i solve this issue?

setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch(PDOException $e) {
  echo "Connection failed: " . $e->getMessage();
  exit;
}

$email = $_POST['email'];
$password = $_POST['password'];

$stmt = $pdo->prepare("SELECT * FROM users WHERE email = :email");
$stmt->execute(['email' => $email]);
$user = $stmt->fetch(PDO::FETCH_ASSOC);

if ($user && password_verify($password, $user['password'])) {
  // valid credentials, store user session
  $_SESSION['user'] = $user;
  echo "success";
} else {
  // invalid credentials
  echo "failure";
}

?>

// login js

$(document).ready(function() {
  $('#login-form').validate({
    rules: {
      email: {
        required: true,
        email: true
      },
      password: {
        required: true
      }
    },
    messages: {
      email: {
        required: "Please enter your email address",
        email: "Please enter a valid email address"
      },
      password: {
        required: "Please enter your password"
      }
    },
    submitHandler: function(form) {
      var email = $('#email').val().trim();
      var password = $('#password').val().trim();
      
      $.ajax({
        type: "POST",
        url: "login.php",
        data: {email: email, password: password},
        success: function(response) {
          if (response === "success") {
            
          } else {
            $('#login-messages').html('
Login failed. Please check your email and password and try again.
');
          }
        },
        error: function() {
          $('#login-messages').html('
Error logging in. Please try again later.
');
        }
      });
    }
  });
});