Better encryption and easier database test

### The required feature described as a wish

As a user I would like to have better encryption and, above all, to be able to perform quick tests without the complexity of setting up traditional databases, so I think it would be a good idea to implement JWT and SQLite in Cloudstack.

JWT could be implemented to improve the way in which users like me or applications access the API, as it uses user/password credentials, as well as a token that expires according to a stipulated time. JWT would be very easy to implement in Cloudstack.

SQLite does not require a dedicated server, which would make Cloudstack less resource-intensive and easier to configure, as well as allowing for rapid prototyping and testing.

ソースファイル、テスト、エントリーポイントは特定されていません。まず、JWT認証とSQLiteサポートの両方が対象範囲に含まれるかを明確にしてください。完了には、提案された各機能について明示的な要件と検証が必要です。

索引モデルが issue の本文から書いたものです。