code: @DELETE
    @Path("{id}")
    @RolesAllowed({"ROLE_ADMIN"})
    public Response delete(@PathParam("id") Long id) {
      checkNotNull(id);
      userService.deleteById(id);
      return Response.noContent().build();
    }
docs: Delete a user.
  
  @param id unique user id
  @return http 204 is successful