Update tip on how to use Kubectl

doc/user/project/clusters/add_eks_clusters.md

@@ -188,9 +188,7 @@ After about 10 minutes, your cluster is ready to go. You can now proceed
 to install some [pre-defined applications](index.md#installing-applications).
 
 NOTE:
-You must add your AWS external ID to the
-[IAM Role in the AWS CLI](https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-role.html#cli-configure-role-xaccount)
-to manage your cluster using `kubectl`.
+If you have [installed and configured](https://docs.aws.amazon.com/eks/latest/userguide/getting-started.html#get-started-kubectl)  `kubectl`  and you would like to manage your cluster with it, you must add your AWS external ID in the AWS configuration. For more information on how to configure AWS CLI, see [using an IAM role in the AWS CLI](https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-role.html#cli-configure-role-xaccount).
 
 ### Cluster creation flow