Creates one or more groups for the account.
Groups can be used to help manage users by associating users with a group. You can associate a group with a Permission Profile, which sets the user permissions for users in that group without having to set the
userSettings property for each user. You are not required to set Permission Profiles for a group, but it makes it easier to manage user permissions for a large number of users. You can also use groups with template sharing to limit user access to templates.
The external account number (int) or account ID Guid.