def remove_users_from_group(id, user_list = [])
      wf_usergroup_id?(id)
      validate_user_list(user_list)
      api.post([id, 'removeUsers'].uri_concat, user_list,
               'application/json')
    end
def remove_users_from_group(id, user_list = [])
      wf_usergroup_id?(id)
      validate_user_list(user_list)
      api.post([id, 'removeUsers'].uri_concat, user_list,
               'application/json')
    end
POST /api/v2/usergroup/{id}/removeUsers
 Remove multiple users from a specific user group

 @param id [String] ID of the user group
 @param user_list [Array[String]] list of users to remove
 @return [Wavefront::Response]