Custom authentication and Autherization

System Information
  • **Strapi Version: 4
  • **Operating System: windows
  • **Database: postgresql
  • **Node Version: 18.12.1
  • **NPM Version: 9.1.3
  • **Yarn Version: 1.22.19

I want to add my custom auth application to strapi. I have developed a auth and authorization (permission vs.) application with node js. It contains access token and refresh token alos. How do i integrate my custom auth application to strapi ?