Как создать RESTful API в Ruby on Rails?

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Rails.application.routes.draw do
  resources :users, only: [:index, :show, :create, :update, :destroy]
end

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class UsersController < ApplicationController
  def index
    @users = User.all
    render json: @users
  end

  def show
    @user = User.find(params[:id])
    render json: @user
  end

  def create
    @user = User.new(user_params)

    if @user.save
      render json: @user, status: :created
    else
      render json: @user.errors, status: :unprocessable_entity
    end
  end

  def update
    @user = User.find(params[:id])

    if @user.update(user_params)
      render json: @user
    else
      render json: @user.errors, status: :unprocessable_entity
    end
  end

  def destroy
    @user = User.find(params[:id])
    @user.destroy
    head :no_content
  end

  private

  def user_params
    params.require(:user).permit(:name, :email)
  end
end

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class User < ApplicationRecord
  validates :name, presence: true
  validates :email, presence: true, uniqueness: true
end

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config.middleware.insert_before 0, Rack::Cors do
  allow do
    origins '*'
    resource '*', headers: :any, methods: [:get, :post, :put, :patch, :delete, :options]
  end
end