@POST
  @Path("/{registrationId}")
  @Consumes(MediaType.APPLICATION_JSON)
  @Produces(MediaType.APPLICATION_JSON)
  public Response postUpdate(
      @Context HttpServletRequest request, @PathParam("registrationId") UUID id, String body)
      throws Exception {
    authService.guardAuthenticatedUser(request);
    Either<String, RegistrationsUpdate> map =
        ArgoUtils.parseEither(body)
            .right()
            .map(x -> x.getNode("tuple"))
            .right()
            .bind(RegistrationsRestService::registrationsUpdate);

    if (map.isLeft()) return Response.serverError().build();
    RegistrationsUpdate ru = map.right().value();

    try (Connection c = dataSource.getConnection()) {
      c.setAutoCommit(false);
      if (!registrationsSqlMapper.one(c, id).isSome())
        return Response.status(Status.NOT_FOUND).build();
      registrationsSqlMapper.update(
          c, id, ru.billingCompany, ru.badge, ru.dietaryRequirements, ru.bundle);
      c.commit();
    }
    return Response.ok().build();
  }