User group object

To save a group, use the UserGroupItem.save method:

const newGroup = System.userGroups.create();
newGroup.data.__name =  'Managers'; 
await newGroup.save(); 

If the required field __name is not filled out, the script returns an error of the following type: Error: field /__name is required;

To search for items in the collection, use the Search object:

const groups = await System.userGroups.search()
    .where(f =>  f.isRole.eq(true)) 
    .all(); 

Read more about using search in the Manage apps article.