GraphQL：添加对架构的订阅

Question

我正在尝试使用GraphQL和Relay设置订阅。我有以下突变，增加了一个新团队：

const createTeamMutation = mutationWithClientMutationId({
  name: 'CreateTeam',
  inputFields: {
    ownerId: { type: new GraphQLNonNull(GraphQLInt) },
    name: { type: new GraphQLNonNull(GraphQLString) },
  },
  outputFields: {
    team: {
      type: teamType,
      resolve: (payload) => payload
    }
  },
  mutateAndGetPayload: (team) => {
    const { ownerId, name } = team;
    // Using Sequalize ORM here..
    return db.models.team.create(team)
    .then.... etc
 }
});

这很好但我似乎无法弄清楚如何让我的订阅至少在GraphiQL中工作。我的架构中有以下定义：

const GraphQLCreateTeamSubscription = subscriptionWithClientId({
  name: 'CreateTeamSubscription',
  outputFields: {
    team: {
      type: teamType,
      resolve: (payload) => payload
    }
  },
  subscribe: (input, context) => {
    // What is meant to go here??
  },
});

我不确定如何构建订阅功能，似乎无法找到足够的文档。当我在GraphiQL中运行以下内容时，

subscription createFeedSubscription {
  team {
    id
    ownerId
    name
  } 
}

我收到以下错误：

Cannot query field team on type Subscription.

感谢您的帮助！