# Module 4

- [Introduction](/commerce-openapis/users/module-4/introduction.md)
- [Dynamic Configuration](/commerce-openapis/users/module-4/introduction/dynamic-configuration.md)
- [System Configuration (requires deployment)](/commerce-openapis/users/module-4/introduction/system-configuration-requires-deployment.md)
- [Authentication](/commerce-openapis/users/module-4/introduction/authentication.md)
- [Profile](/commerce-openapis/users/module-4/profile.md)
- [Registration](/commerce-openapis/users/module-4/registration.md)
- [Permissions](/commerce-openapis/users/module-4/permissions.md)
- [Segments](/commerce-openapis/users/module-4/segments.md)
- [Cards](/commerce-openapis/users/module-4/cards.md)
- [Security](/commerce-openapis/users/module-4/security.md)
- [Models](/commerce-openapis/users/module-4/models.md)