In Redshift how can I create an user which which has only user creation privileges?

Question

The primary requirement is to automatically create or alter users based on user information stored in a table. I am planning to write a stored procedure / use Databricks notebook to do the automation. The Redshift user which I use for creating other users in this automation should only user create/alter permissions. It is the only which should be performed from that user. I read that the option CREATEUSER option apparently gives super user like privileges to the user. How can i restrict/revoke other superuser privileges?