As I know root is the default administrator user who has full access on Memsql Cluster. Please let me know how to add a database administrator user (DBA user) and which grants need to provide to him. It would be helpful if you share the steps.
The docs describe CREATE USER and GRANT An example:
CREATE USER joe;
GRANT SELECT ON mydb.* TO 'joe'@'%';
Which grants would you need to give a DBA user? This likely depends on the requirements of your business and the needs of their tasks. SingleStoreDB Cloud ยท SingleStore Documentation has a full list of the permissions you can grant.