MySQL SteamID

<?php

    // MYSQL DATABASE STUFF

    $testuser = "FlappyBlubber";

    $testuserid = "1232131"; // steam id

    $server = "localhost";

    $user = "root";

    $pass = "";

    $db = "csgodemise";

    $conn = mysqli_connect($server, $user, $pass, $db);

    if(!$conn) {

        die("Could not connect to MySQL!");

    }

    $sql = "SELECT * FROM players WHERE steamid = '$testuserid'"; // gets everything (name, id, coins, steamid) from row in table where id = 1

    $result = mysqli_query($conn, $sql);

    $count = mysqli_num_rows($result);

    if($count == 0) {

        die("User does not exist!");

    } else {

        foreach($result as $row) {

            $name = $row["name"]; // gets the name from the row

            $coins = $row["coins"]; // gets coins from the row

        }

    }

?>