PHP CODE THATS NOT WORKING

<?php
session_start();
$handler = new PDO("mysql:host=sql201.epizy.com;dbname=epiz_23049049_phpblog", "epiz_23049049", "rustinelagdave");
?>

<?php include "parts/top.php" ?>

<div class='container'>
    <div class="segment">
        <h2>LOG IN</h2>
        <hr>
        <form class='ui form' method='POST'>
            <p>Username</p>
            <input required='required' type="text" name="username">
            <p>Password</p>
            <input required='required' type="password" name='password'>
            <div class="tenpx-margin"></div>
            <div class='logsign-buttons'>
                <button class='ui button green' type='submit' name='submit'>LOG IN</button>
                <a href="signup.php">No Account? Sign up!</a>
            </div>
        </form>

    <?php
    if(isset($_POST['submit'])){
        $typed_username = $_POST['username'];
        $typed_password = $_POST['password'];

        $query = $handler->query("SELECT * FROM users WHERE username = '$typed_username'");
        $result = $query->fetchAll();

            if(sizeof($result) > 0){
                $result = $result[0];

                // Gather Data
                $user_password = $result['password'];
                $user_id = $result['id'];

                if($typed_password === $user_password){

                    $_SESSION['id'] = $user_id;
                    echo("<script>location.href ='dashboard.php'</script>");

                }else{
                    echo "<div class='tenpx-margin'></div><p class='notif'>Bummer! Wrong Password.</p>";
                }
            }else{
                echo "<div class='tenpx-margin'></div><p class='notif'>Bummer! You're not signed up.</p>";
            }
        }
    ?>
    </div>
</div>
<?php include "parts/bottom.php"?>