Данные не попадают в таблицу

<?php
    $connection = mysqli_connect('127.0.0.1', 'furryonelove', 'qwertY1', 'MainDB');
 
    if ( $connection == false ) {
      echo "База данных недоступна!";
      exit;
    } else {
 
    require 'steamauth/steamauth.php';
    loginButton();
    require 'steamauth/userInfo.php';
 
    $playerid = $steamprofile['steamid'];
    $nickname = $steamprofile['personaname'];
    $raw_SQL_answer = mysqli_query($connection, "SELECT `id` FROM `players` WHERE `steamid` = '$playerid' ");
    $SQL_answer = mysqli_fetch_assoc($raw_SQL_answer);
 
      if ( $SQL_answer['id'] == 0 ) {
        $BDreg = mysqli_query($connection, "INSERT INTO `players`(steamid, nickname) VALUES ($playerid, $nickname)");
        echo "Регистрация успешна!";
        exit;
      } else {
 
        if (isset($_SESSION['steamid'])){
            echo 'Вы вошли в систему как ';
            echo $nickname;
            echo '<br/>';
            logoutbutton();
            }
        }
      }
  ?>

if ( $SQL_answer['id'] == 0 )

if (empty($SQL_answer['id']))

ini_set('error_reporting', E_ALL);
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);

$playerid = $steamprofile['steamid'];
$nickname = $steamprofile['personaname'];
echo $playerid . "<br/>" . $nickname;

} else if (isset($_SESSION['steamid'])){

$BDreg = mysqli_query($connection, "INSERT INTO `players`(steamid, nickname) VALUES ($playerid, '$nickname')");

$BDreg = mysqli_query($connection, "INSERT INTO `players`(steamid, nickname) VALUES (127, 'test_nick')");

$raw_SQL_answer = mysqli_query($connection, "SELECT `id` FROM `players` WHERE `steamid` = '$playerid' ");