dellemc.powerscale.nfs not getting option to make it MAP_ROOT user as "ROOT"

- name: "Create NFS Share(read_write_clients) With quota_full_path_dev_source -> { { quota_full_path_dev_source }}"
dellemc.powerscale.nfs:
onefs_host: "{ { isilon_ip_address_p }}"
verify_ssl: "false"
api_user: "{ { isilon_api_user }}"
api_password: "{ { isilon_api_password }}"
path: "{ { quota_full_path_dev_source }}"
description: "{ { description }}"
access_zone: "System"
read_write_clients:
- "{ { item }}"
sub_directories_mountable: true # --all-dirs yes
client_state: 'present-in-export'
state: 'present'
loop: "{ { client_nfs_export_server_list }}"

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we noticed that by above code we are getting

"map_root":
{
"groups": [""],
"user": "nobody" -----------> nobody should be replaced with root
}

how to achieve this.