# Normal usage

[Back](../../readme.md)

Classes you can use are located in the ``\LDC\LDCCRM\Models`` namespace.

- ``Answer`` : To provide an answers to a specific question.
- ``Customer`` : To fetch, create, update, delete, authenticate, activate, opt in or opt out you customer.
- ``Question`` : Used to fetch questions, unanswered question but also answered questions.
- ``SingleOptin`` : Use this to create a single opt in. For people who might just want to subscribe to a newsletter.
- ``Stats`` : Use this to fetch stats about questions or just general stats.


For more detailed info, you may refer to the [Client API DOC](../client-api/index.html)