mysqli_fetch, авторизация на php.

    $User = $mysqli->query('SELECT `id` FROM `admins`  WHERE `login` = '.$login.' AND `password` = '.$password.'');
    $UserID = $mysqli->fetch($User);

Fatal error: Call to undefined method mysqli::fetch() in /home/frukt/public_html/admin.php on line 66

$UserID =  $result = $User->get_result()->fetch($User);

Fatal error: Call to a member function fetch_array() on a non-object in /home/frukt/public_html/admin.php on line 66

$UserI = $User->fetch_array(MYSQLI_ASSOC);

Fatal error: Call to a member function fetch_array() on a non-object in /home/frukt/public_html/admin.php on line 66

<?php
if (isset($_POST['submit']))
{
$login = htmlspecialchars($_POST['login']);
$login = $mysqli->real_escape_string($login);
$password = htmlspecialchars($_POST['password']);
if(empty($login) || empty($password)) {
    echo $Message->AlertMsg("2", "Вы не ввели логин и/или пароль", "2");
}
else{
    $User = $mysqli->query('SELECT * FROM `admins`  WHERE `login` = '.$login.' AND `password` = '.$password.'');
    $UserI = $User->fetch_array(MYSQLI_ASSOC);
    //$UserID = $mysqli->fetch($User);
    if(empty($UserI['id'])) {
        echo $Message->AlertMsg("1", "Вы успешно вошли, переадресация ...", "1");
    }
}
}
    var_dump($User);
    if(!$User){
mysqli_error();
}
?>

if(is_object($UserI))