In this video, you will see how to create and display a custom author box based upon the nickname value for the author as noted in the author’s user profile in the WordPress admin Users area.
GeneratePress is the theme and the GeneratePress Premium add on is used to facilitate the GP Hooks functionality. GP Hooks also has the ability to optionally execute PHP, which is needed for this process.
Note: substitute “author-1-nickname”, etc., and “XXX” with your own values.
If you have only the one author, then you can use this code instead, substituting the “XXX” with your own value.