Logging issue into the Cluster

Hello Everyone, I have a Private EKS cluster. I want to access my cluster from a new Ec2 instance having kubectl and aws cli installed. Previously, everything is fine means i am able to access my Eks cluster and performing kubectl commands. But accidentally, i deleted aws-auth-cm.yml file. Then after It gives error : "You must be logged in to the Cluster (Unauthorised)". After that, i created a new eks cluster, with the same name, configuration and roles. And deleted previous one. Kindly, requesting or guide me how to access my eks cluster now step by step. I studied lot of articles and posts. But problem not solved.