function authenticate($user, $pass){
        $sql  = "SELECT * FROM Users ";
        $sql .= " WHERE UniqueUser = "{$user}" ";
        $sql .= " AND HashedPass = "{$pass}" ";
        $sql .= " LIMIT 1";

        $result = mysqli_query($sql);
        $result_set = mysqli_fetch_array($result);
        return !empty($result_set) ? array_shift($result_set) : false;
}

function authenticate($user, $pass){
        $sql  = "SELECT * FROM Users ";
        $sql .= " WHERE LastName= "{$user}" ";
        $sql .= " AND HashedPass = "{$pass}" ";
        $sql .= " LIMIT 1";

        $result = mysqli_query($sql);
        $result_set = mysqli_fetch_array($result);
        return !empty($result_set) ? array_shift($result_set) : false;
}