grav-plugin-aura-authors/blueprints/aura-authors.yaml

form:
  fields:
    tabs:
      fields:
        aura:
          type: tab
          title: Aura

          fields:

            header.aura.author:
              type: select
              label: Author
              size: medium
              data-options@: '\Grav\Plugin\AuraAuthorsPlugin::listAuthors'
              options:
                '': ''