Nexus Sync uses standard HTTP Status Codes for every request:
* 400 Bad Request: The request was invalid, or validation failed.
* 401 Unauthorized: The request requires a user authentication.
* 500 Internal Server Error: We hope you never have to see this one. Either the request has something we never expected, or we made a bad mistake somewhere that made it through our testing.
* 200 OK: Everything is good.
* 201 Created: New resources has been created.
* 202 Accepted: Request is accepted, and it’ll be processed later.