پیام خطا در ارتباط با دیتا بیس

پیغام:

Fatal error: Uncaught mysqli_sql_exception: Unknown database 'users' in C:\xampp\htdocs\dashboard\New\najib\controllers\us ersControllers.php:3 Stack trace: #0 C:\xampp\htdocs\dashboard\New\najib\controllers\us ersControllers.php(3): mysqli_connect('localhost', 'root', Object(SensitiveParameterValue), 'users', '3306') #1 {main} thrown in C:\xampp\htdocs\dashboard\New\najib\controllers\us ersControllers.php on line 3

کد نوشته شده

<?php

$conn = mysqli_connect("localhost", "root", "", "users", "3306")or die("not
connected");
echo "connected";