admin and user

<?php
$conn = mysqli_connect("localhost", "root", "", "database");//ubah yang ni
session_start();
if(isset($_SESSION["username"])){
    $user_info = mysqli_fetch_assoc($conn, "SELECT * FROM users WHERE username = '$_SESSION[username]'");
    if($user_info["type"] == "admin"){

        echo "YOU ARE ADMIN.";
    }
    else{

        echo "YOU ARE USER. (Booo)";
    }
}
else{
    echo "require login to view this pages. <a href='login.php'>go to login page.</a>";
}

?>