by Shadi G شادي جـ on WordPress.org
This plugin allows you to choose an author, create a guest author or choose multiple authors and contributors..

This plugin allows you to seamlessly add guest authors or contributors to your WordPress posts, specifically within block themes (Full Site Editing). Guest authors/contributors created with this plugin function identically to regular user authors, complete with dedicated archive pages showcasing all their content.
✅ Effortless Guest Contributor Integration: Add guest authors/contributors to your posts without creating user accounts. They’ll function just like regular authors.
✅ Dedicated Author Archives: Each guest author will have their own archive page displaying all their published posts.
✅ Multiple Post Guest Author or Contributor Support: Have a variety of guest authors/contributors? No problem! This plugin allows for the addition of multiple guest authors/contributors.
✅ Multiple Roles Support: Have a variety of post contributtor (author, fact-checker, etc)? No problem! This plugin allows for the assingment of multiple roles for contributors.
✅ Ability to support any post type: You can chose which post type to add this feature to.
✅ One click migratiion from PublisherPress Authors: You can migrate on one click from PublisherPress Authors. Migration from other plugins will be included in new releases soon.
You can use the mshmn_all_post_author_names custom field (post meta) to retrieve all primary authors or contributors assigned under the default role.
A common use case is when you want to define a custom schema.org configuration for a post type, and want to set the post author attribute.