Warning: mysql_fetch_array() expects parameter 1 to be resource, boolean given in C:\xampp\htdocs\login.php

i'm getting the following error

Warning: mysql_fetch_array() expects parameter 1 to be resource, boolean given in C:\xampp\htdocs\login.php

everything else work fine... except for this !

Here's my query :

<?php

$inputuser = $_POST["user"];
$inputpass = $_POST["pass"];

$user = "root";
$password = "";
$database = "share";

$connect = mysql_connect("localhost:3306",$user,$password);
@mysql_select_db($database) or ("Database not found");

$query = "SELECT * FROM 'users' WHERE 'username'= '$inputuser'";
$querypass = "SELECT * FROM 'users' WHERE 'password'= '$inputpass'";

$result = mysql_query($query); 
$resultpass = mysql_query($querypass); 

$row = mysql_fetch_array($result);
$rowpass = mysql_fetch_array($resultpass);

$serveruser = $row['user'];
$serverpass = $row['password'];

if ($serveruser && $serverpass) {
    if (!$result) {
       die ("Invalid Username/Password");

 }
        header('Location: Fail.php');
        mysql_close();


if ($inputpass == $serverpass) {

        header('Location: Home.php');

} else {


}
}

?>


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