User-agent: *
Disallow: /wp-admin/
Disallow: /wp-login.php
Allow: /wp-admin/admin-ajax.php

User-agent: Googlebot
Disallow: /wp-admin/
Disallow: /wp-login.php
Allow: /wp-admin/admin-ajax.php

User-agent: Bingbot
Disallow: /wp-admin/
Disallow: /wp-login.php
Allow: /wp-admin/admin-ajax.php

User-agent: AhrefsBot
Disallow: /wp-admin/
Allow: /wp-admin/admin-ajax.php

User-agent: AhrefsSiteAudit
Disallow: /wp-admin/
Allow: /wp-admin/admin-ajax.php