Lists all the superusers that can manage MemSQL Ops.
Superusers are privileged users that can make changes that modify MemSQL and MemSQL Ops behavior. By default, no superuser is defined. In this case, all who access the MemSQL Ops interface have read/write access.
usage: memsql-ops superuser-list [--settings-file SETTINGS_FILE] [-q] [-j] List superusers that can manage MemSQL Ops. optional arguments: --settings-file SETTINGS_FILE A path to a MemSQL Ops settings.conf file. If not set, we will use the file in the same directory as the MemSQL Ops binary. -q, --quiet Only display superuser names. -j, --json Print output as JSON.