def grant_permission(permission, user_list)
      raise ArgumentError unless user_list.is_a?(Array)
      validate_user_list(user_list)
      api.post(['grant', permission].uri_concat, user_list,
               'application/json')
    end
def grant_permission(permission, user_list)
      raise ArgumentError unless user_list.is_a?(Array)
      validate_user_list(user_list)
      api.post(['grant', permission].uri_concat, user_list,
               'application/json')
    end
POST /api/v2/user/grant/{permission}
 Grants a specific user permission to multiple users
 See #grant for possible permissions. This method operates on
 multiple users.
 @param permission [String] permission to grant
 @param user_list [Array[String]] users who should receive the
   permission
 @return [Wavefront::Response]