BadRequest will return an error message indicating that the request is invalid.

Conflict xxx.

Forbidden will block user access the resource, not authorized.

InternalError will return an error message indicating that the something is error inside the controller.

NotAcceptable xxx.

OK reply.

ResourceNotFound will return an error message indicating that the resource is not exist.

Response : http response func (no return http code).

ServiceUnavailable will return an error message indicating that the service is not available now.

Unauthorized will block user access the api, not login.