Found this useful link:
https://www.cloudera.com/documentation/enterprise/latest/topics/cm_sg_s3_cm_principal.html
If you are using Active Directory:
- Create an Organizational Unit (OU) in your AD setup where all the principals used by your CDH cluster will reside.
- Add a new user account to Active Directory, for example, <username>@YOUR-REALM.COM. The password for this user should be set to never expire.
- Use AD's Delegate Control wizard to allow this new user to Create, Delete and Manage User Accounts.