code: func (r User_Permission_Role) AddUser(user *datatypes.User_Customer) (err error) {
  	var resp datatypes.Void
  	params := []interface{}{
  		user,
  	}
  	err = r.Session.DoRequest("SoftLayer_User_Permission_Role", "addUser", params, &r.Options, &resp)
  	return
  }
docs: // no documentation yet