如何在graphql中实现分页，graphql在返回数据集的同时返回分页元数据

type Query {
  getUsers(page: Int, pageSize: Int): UserConnection
}

type UserConnection {
  totalCount: Int
  pageInfo: PageInfo
  edges: [UserEdge]
}

type PageInfo {
  hasNextPage: Boolean
  hasPreviousPage: Boolean
  startCursor: String
  endCursor: String
}

type UserEdge {
  cursor: String
  node: User
}

const resolvers = {
  Query: {
    getUsers: (parent, { page, pageSize }) => {
      // 根据分页参数进行数据查询和切片
      const startIndex = (page - 1) * pageSize;
      const endIndex = startIndex + pageSize;
      const users = db.getUsers().slice(startIndex, endIndex);

      // 构建分页结果对象
      const totalCount = db.getUsers().length;
      const hasNextPage = endIndex < totalCount;
      const hasPreviousPage = startIndex > 0;
      const startCursor = users.length > 0 ? users[0].id : null;
      const endCursor = users.length > 0 ? users[users.length - 1].id : null;
      const edges = users.map(user => ({
        cursor: user.id,
        node: user
      }));

      return {
        totalCount,
        pageInfo: {
          hasNextPage,
          hasPreviousPage,
          startCursor,
          endCursor
        },
        edges
      };
    }
  }
};

query {
  getUsers(page: 1, pageSize: 10) {
    totalCount
    pageInfo {
      hasNextPage
      hasPreviousPage
      startCursor
      endCursor
    }
    edges {
      cursor
      node {
        id
        name
        age
      }
    }
  }
}