code: @GET
    @PermitAll
    @Path("uniquetag/{uniqueTag}")
    public Response findByUniqueTag(@PathParam("uniqueTag") String uniqueTag) {
      checkNotNull(uniqueTag);
  
      DContact contact = dao.findByUniqueTag(null, uniqueTag);
  
      return null != contact ? Response.ok(contact).build() : Response.status(Response.Status.NOT_FOUND).build();
    }
docs: Find a contact based on its unique tag.
  
  @param uniqueTag unique contacts tag
  @return a contact entity