Accessing joined table?

Since Phalcon doesnt have an option to join tables from the model instead querying the table you want (on the fly) I needed (for performance reasons) for phalcon to join a table straight away.

My code

    public static function getServers($userid)
    {
        return (new self)->getModelsManager()->createBuilder()->from('Users')
            ->where("Users.id = :userid:")
            ->join("Servers", "Users.id = server.owned_by", "server")
            ->getQuery()->execute(['userid' => $userid]);
    }

Then when I try to access $user[0]->server There is no property $server set, How can i access these joined tables?

Or is there a better way for me join the servers table onto the users table in the first query