Default Sitecore Authentication Enabler Config

Sitecore.Owin.Authentication.Enabler.config

<?xml version="1.0" encoding="utf-8"?>
<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/" xmlns:role="http://www.sitecore.net/xmlconfig/role/">
  <sitecore role:require="Standalone or ContentManagement">
    <settings>
      <setting name="FederatedAuthentication.Enabled">
        <patch:attribute name="value">true</patch:attribute>
      </setting>
    </settings>
    <services>
      <register serviceType="Sitecore.Abstractions.BaseAuthenticationManager, Sitecore.Kernel" implementationType="Sitecore.Owin.Authentication.Security.AuthenticationManager, Sitecore.Owin.Authentication" lifetime="Singleton" />
      <register serviceType="Sitecore.Abstractions.BaseTicketManager, Sitecore.Kernel" implementationType="Sitecore.Owin.Authentication.Security.TicketManager, Sitecore.Owin.Authentication"  lifetime="Singleton" />
      <register serviceType="Sitecore.Abstractions.BasePreviewManager, Sitecore.Kernel" implementationType="Sitecore.Owin.Authentication.Publishing.PreviewManager, Sitecore.Owin.Authentication" lifetime="Singleton" />
    </services>
  </sitecore>
</configuration>