//-----types.graphql

type Post {
  id: Int
  user_id: Int
  title: String
  description: String
  created_at: Date
  updated_at: Date
}

type User {
  id: Int
  username: String
  password: String
  created_at: Date
  updated_at: Date
}

type Query {
  users: [User]
  user(id: Int!): User
  posts: [Post]
  post(id: Int!): Int
}

//------resolver.js

const resolvers = {
 ...
 async users() {
   const users = await User.all()
   return users.toJSON()
 },
 // Get a user by its ID
 async user(_, { id }) {
   const user = await User.find(id)
   return user.toJSON()
 }
 async posts() {
   const posts = await Post.all()
   return posts.toJSON()
 },
 // Get a user by its ID
 async post(_, { id }) {
   const post = await Post.find(id)
   return post.toJSON()
 }
 ...
}