Ruby/Sinatra Refactor for Code Climate

gistfile1.rb

# Original Code
class App < Sinatra::Base
  get '/users' do
    User.all.to_json
  end
  
  post '/users' do
    User.create!(params)
    204
  end
  
  get '/users/:id' do |id|
    User.find(id).to_json
  end
  
  # etc
end

# Intermediate Code
module UserRoutes
  def self.registered(app) # <-- a method yes, but really a hook
    app.get '/users' do
      User.all.to_json
    end
  
    app.post '/users' do
      User.create!(params)
      204
    end
  
    app.get '/users/:id' do |id|
      User.find(id).to_json
    end
  
    # etc
  end
end

class App < Sinatra::Base
  register UserRoutes
end

# Desired Code
# Intermediate Code
module UserRoutes
  def self.registered(app) # <-- a method yes, but really a hook
    app.namespace '/users' do
    app.get do
      User.all.to_json
    end
  
    app.post do
      User.create!(params)
      204
    end
  
    app.get '/:id' do |id|
      User.find(id).to_json
    end
  
    # etc
  end
end

class App < Sinatra::Base
  register UserRoutes
end