code: @GET
    @RolesAllowed({"ROLE_ADMIN"})
    public Response readPage(@QueryParam("pageSize") @DefaultValue("10") int pageSize,
                             @QueryParam("cursorKey") String cursorKey) {
  
      CursorPage<DUser> page = userService.readPage(pageSize, cursorKey);
  
      return Response.ok(page).build();
    }
docs: Get a page of users.
  
  @param pageSize  Optional. Page size.
  @param cursorKey Optional. Cursor key
  @return a page of user domain objects