How to gracefully shutdown zero leader/transfer leader

What I want to do

I would like to gracefully remove the zero leader. I am trying to delete the pvc so that it encrypts the ec2 volume when it spins a new volume up for the zero pod.

What I did

I tried to use the same process for the alpha pods. This is a self-hosted dgraph configuration in EKS. I port forward to my zero leader and tried to run a GraphQL query:
mutation {
shutdown {
response {

This process works on alpha nodes, but did not work on the zero node. It came back with 404 page not found.

Dgraph 21.03.2