How to perform Custom User Authentication and Authorization

Strapi = v4
node= v16

I am using my own login system, which create users in my own db but not in Strapi. How can i authorize my user to access API from Strapi.
I am able to verify jwt token using custom middleware but Strapi’s default authorization system is blocking to access API.
Is it possible to disable strapi::security?
How do i do it?

You want to make a custom auth system like u&p still this is not properly documented