How to handle 4XX Errors?

As a general rule, you should never retry a request on a 4xx error before attempting to fix the issue first. 

• The 4xx errors indicate a problem with the call, not the service.
• The most common one is 400 which typically means there is an invalid parameter like the reservation ID or property ID is missing.
• The common special case is 401 (Unauthorized) where you should try to get a new auth token: https://api.cloudbeds.com/api/v1.2/access_token to refesh the token a nd can try the call again with the new auth token.