Comment by fainpul

I didn't see this mentioned in the article: wouldn't the obvious way be to make the private field private (lowercase)?

(I'm not a Go developer, just tried the language casually).

    type User struct {
     Username string `json:"username_json_key,omitempty"`
     Password string `json:"password"`
     isAdmin  bool
    }

https://go.dev/play/p/1m-6hO93Xce