Https://www.codecademy.com/courses/learn-go/projects/comic-mischief

URL OF THE WEBPAGE -https://www.codecademy.com/courses/learn-go/projects/comic-mischief
The source code


In this project, I am getting the output as a bunch of errors which are mentioned below.

./main.go:5:7: publisher declared and not used
./main.go:9:7: year declared and not used
./main.go:10:7: pageNumber declared and not used
./main.go:11:7: grade declared and not used

What should I do in order to resolve these errors

use it or don’t declare it? isn’t that what it’s complaining about?