I´m new im programing and get a Youtube video explaining how to make a covertion to calculate the amount of views each of authors on the Wordpress website. My Problem is, how can I get the vatiable that I should put on the code:

window.dataLayer = window.dataLayer || [];
window.dataLayer.push ({
    'author' : 'John Doe'
})

John Doe = The variable to get the Name or UserId from the Author.

Can Anyone HELP this desperated soul

Thanks Rodrigo Moragas