package auth import ( "encoding/json" "os" ) type Option func(a *Auth) error func WithFile(file string) Option { return func(a *Auth) error { data, err := os.ReadFile(file) if err != nil { return err } if err = json.Unmarshal(data, &(a.info)); err != nil { return err } a.file = file return nil } } func WithInfo(info Info) Option { return func(a *Auth) error { a.info = info return nil } } func WithInfoUpdateCallback(callback Callback) Option { return func(a *Auth) error { a.callback = callback return nil } }