Enabling Extension Lifecycle

Summary:

Hi There, I am helping customer to enable/migrate RW, i have a question regarding switching to Extension lifecycle.

Content (please ensure you mask any confidential information):

I have setup my project and all environments using the Basic authentication method. I just chanced upon an update that we should use Extension Lifecycle which will significantly reduce the deployment from instances to instances. However, to use Extension Lifecycle, we need to use Auth2.0. Now the issue here, is as i have created all my environments (Test,Dev1 and Prod) with basic authentication. How can i switch to Extension Lifecycle, so that we can remove the challenges when deploying from instance to instance.