portainer/app/azure/rest/subscription.js

angular.module('portainer.azure')
.factory('Subscription', ['$resource', 'API_ENDPOINT_ENDPOINTS', 'EndpointProvider',
function SubscriptionFactory($resource, API_ENDPOINT_ENDPOINTS, EndpointProvider) {
  'use strict';
  return $resource(API_ENDPOINT_ENDPOINTS + '/:endpointId/azure/subscriptions', {
    'endpointId': EndpointProvider.endpointID,
    'api-version': '2016-06-01'
  },
  {
    query: { method: 'GET' }
  });
}]);