Perform administration tasks. More information: https://www.keycloak.org/docs/latest/server_admin/#admin-cli.
kcadm.sh config credentials --server host --realm realm_name --user username --password password
kcadm.sh create users -s username=username -r realm_name
kcadm.sh get realms
kcadm.sh update realms/realm_name -f path/to/file.json