public function updateForumTopic($topicID, $data = [])
    {
        $validator = \Validator::make($data, [
            "forum" => "numeric",
            "author"      => "numeric",
            "author_name" => "required_if:author,0|string",
            "title" => "string",
            "post" => "string",
            "prefix" => "string",
            "tags"        => "string|is_csv_alphanumeric",
            "date"        => "date_format:YYYY-mm-dd H:i:s",
            "ip_address"  => "ip",
            "locked"      => "in:0,1",
            "open_time"   => "date_format:YYYY-mm-dd H:i:s",
            "close_time"  => "date_format:YYYY-mm-dd H:i:s",
            "hidden"      => "in:-1,0,1",
            "pinned"      => "in:0,1",
            "featured"    => "in:0,1",
        ], [
            "is_csv_alphanumeric" => "The :attribute must be a comma separated string.",
        ]);

        if ($validator->fails()) {
            $message = head(array_flatten($validator->messages()));
            throw new Exceptions\InvalidFormat($message);
        }

        return $this->postRequest("forums/topics/" . $topicID, $data);
    }