@RequestMapping(method = RequestMethod.GET, value = ApiUrls.URL_USERS_USER_CUSTOMERS_CUSTOMER)
 HttpEntity<Resource<Customer>> loadSingleUserCustomer(
     @PathVariable Long user, @PathVariable Long customer) {
   Resource<Customer> customerResource =
       customerResourceAssembler.toResource(this.crmService.findCustomerById(customer));
   return new ResponseEntity<Resource<Customer>>(customerResource, HttpStatus.OK);
 }
 @RequestMapping(method = RequestMethod.GET, value = ApiUrls.URL_USERS_USER_CUSTOMERS)
 HttpEntity<Resources<Resource<Customer>>> loadUserCustomers(@PathVariable Long user) {
   Collection<Resource<Customer>> customerResourceCollection = new ArrayList<Resource<Customer>>();
   for (Customer c : this.crmService.loadCustomerAccounts(user)) {
     customerResourceCollection.add(customerResourceAssembler.toResource(c));
   }
   Resources<Resource<Customer>> customerResources =
       new Resources<Resource<Customer>>(customerResourceCollection);
   customerResources.add(
       linkTo(methodOn(UserController.class).loadUserCustomers(user)).withSelfRel());
   return new ResponseEntity<Resources<Resource<Customer>>>(customerResources, HttpStatus.OK);
 }