带有typescript的Apollo网关不接受上下文中的用户ID

我一直在尝试使用typescript实现Apollo的新网关。但我一直遇到一个打字稿的问题，我似乎无法解决。错误消息为“类型“TContext”.ts（2339）”上不存在属性“userId”。注意，我试图在AWS Lambda上实现

据我所知，通过查看包源代码TContext=Record可以看出，它是一个对象，但似乎无法解析

import { ApolloServer } from 'apollo-server-lambda';
import { ApolloGateway, RemoteGraphQLDataSource } from '@apollo/gateway';


const gateway = new ApolloGateway({
  serviceList: [
    { name: 'users', url: 'xx' },
    { name: 'precedents', url: 'xx' }
    // other services
  ],
  buildService({ url }) {
    return new RemoteGraphQLDataSource({
      url,
      willSendRequest({ request, context }) {
        // pass the user's id from the context to underlying services
        // as a header called `user-id`
        request && request.http && request.http.headers.set('user-id', context.userId);
      }
    });
  }
});

const server = new ApolloServer({
  gateway,
  subscriptions: false,
  context: ({ event, context }) => {
    // get the user token from the headers
    const token = event.headers.authorization || '';

    // try to retrieve a user with the token
    const userId = token;

    // add the user to the context
    return {
      headers: event.headers,
      functionName: context.functionName,
      event,
      context,
      userId
    };
  }
});

exports.handler = server.createHandler({
  cors: {
    origin: true,
    credentials: true,
    methods: ['POST', 'GET'],
    allowedHeaders: ['Content-Type', 'Origin', 'Accept', 'authorization']
  }
});

编辑 根据下面的更新似乎会导致相同的问题

interface MyContext{
    userId: string;
}

const gateway = new ApolloGateway({
  serviceList: [
    { name: 'users', url: 'xx' },
    { name: 'precedents', url: 'xx' }
    // other services
  ],
  buildService({ url }) {
    return new RemoteGraphQLDataSource({
      url,
      willSendRequest<MyContext>({ request, context } : {request: GraphQLRequest, context: MyContext}) {
        // pass the user's id from the context to underlying services
        // as a header called `user-id`
        request && request.http && request.http.headers.set('user-id', context.userID);
      }
    });
  }
});

接口MyContext{
userId:string；
}
const gateway=新网关({
服务列表：[
{name:'users'，url:'xx'}，
{name:'先例'，url:'xx'}
//其他服务
],
构建服务（{url}）{
返回新的RemoteGraphQLDataSource({
网址，
willSendRequest（{request，context}:{request:GraphQLRequest，context:MyContext}）{
//将用户id从上下文传递到基础服务
//作为名为`用户id'的标头`
request&&request.http&&request.http.headers.set（'user-id'，context.userID）；
}
});
}
});

首先，创建一个描述graphql上下文的接口

interface MyContext{
    userId: string;
}

然后向willSendRequest方法添加MyContext类型参数，如下所示

...
willSendRequest<MyContext>({request, context}) {
...

。。。
willSendRequest（{request，context}）{
...

---

现在编译器知道了，该上下文是MyContext类型。

感谢您的回复。很抱歉，我对Typescript还是相当陌生，仍然无法解决Typescript错误。更新后的代码仍然会给出相同的错误？我已经用新代码更新了上面的内容。