我应该如何将prisma客户端实例传递到graphql上下文？

const { ApolloServer, gql } = require('apollo-server');
const { PrismaClient } = require('@prisma/client');

const prisma = new PrismaClient();

const typeDefs = gql`
  type Query {
    users: [User!]!
  }

  type User {
    id: ID!
    name: String!
    email: String!
  }
`;

const resolvers = {
  Query: {
    users: async () => {
      return prisma.user.findMany();
    },
  },
};

const server = new ApolloServer({
  typeDefs,
  resolvers,
  context: ({ req }) => {
    return {
      ...req,
      prisma, // 将 Prisma 客户端实例添加到上下文中
    };
  },
});

server.listen().then(({ url }) => {
  console.log(`Server running at ${url}`);
});