How to build a serverless blog back end in one tweet with @awsamplify

schema.graphql

type Blog @model
  @auth(rules: [
    { allow: groups, groups: ["Admin"] }, { allow: public, operations: [read] }
  ]) {
  id: ID!
  name: String!
  posts: [Post] @connection(name: "BlogPosts")
}
type Post @model
  @auth(rules: [
    { allow: owner }, { allow: public, operations: [read] }
  ]) {
  id: ID!
  title: String!
  blog: Blog @connection(name: "BlogPosts")
  comments: [Comment] @connection(name: "PostComments")
}
type Comment @model
  @auth(rules: [
    { allow: owner }, { allow: public, operations: [read] }
  ]) {
  id: ID!
  content: String
  post: Post @connection(name: "PostComments")
}

See this gist for details of the API CLI workflow.