Use errors pkg to handle error in mutiple layered RESTful service
Inpired by https://stackoverflow.com/questions/63306404/overriding-errors-is-not-working-with-custom-errors
method_one.go
Use errors.As in top layer, handle the error created by errors.New in middle layers, as a result, the custom error will be "throw" from bottom layer to top layer
main.go
Implement interface{ Is(error) bool } interface for custom error, and use errors.Is in top layer to determine if the error stack contains custom error
Suggest method two