How to set up Serverless access for Existing AD groups

Setting up access in the Serverless Pool is very messy, even there is no proper documentation available which says how to do it. For a specific user documentation is avilable but how to setup for the already available AD groups. Earlier we were using Dedicated sql pool but now switched to Serverless, it is good but right now I have to create a login and then assign a user to it and then grant privilege's to that user for specific object/s. How Can I reuse the existing Azure AD groups. I want all the users who are there in group to access according to their rights. For Data lake it is sorted but for serverless not able to figure out how to do it.