Condition to create a new user group via REST API
When a user group is created from Administration console, group member is a required field; meaning cannot create a member-empty user group.
Likewise, when a User Group is created via webservice, as described in CREATEGROUP part of the below Wiki page, group member is a required field.
Meanwhile, when a user group is created via REST API, group member is NOT a required filed as described in ReDoc, and a member-empty group can be created.
However, once this group is opened from GUI, cannot save without adding a member.
Considering the above factors, member-empty group can be created only via REST API, while it is not possible from GUI or via webservice
Is this by design?
Detail steps are described in attached.