Happy paths 😃

Response code	Description
200* OK	Everything worked as expected. Generic, happy response code, if none of the other 2XX are better suited
201* Created	Returned if we create a new resource
202* Accepted	Acknowledgement of the request but will be processed asynchronously (so the handling could still fail)
204* No Content	A successful request with no body - maybe used in the case of deleting a resource

Client error 🤦‍♂️

Response code	Description
400* Bad Request	Generic client error, if none of the below are more suitable
401* Unauthorized	Literally missing auth token, or token is expired or revoked
403* Forbidden	Insufficient roles - typical if a user doesn't have permission to perform a requested action
404* Not Found	The entity doesn't exist, for all intensive purposes (or the authenticated user has no access to it)
405* Method Not Allowed	Incorrect or unsupported HTTP method used for an endpoint
422* Unprocessable Entity	Request validation error. More details should be provided in the body

5XX Server error - hopefully these are rare!