old_contents: from flask import Flask
  from flask.ext import restful
  from resources.sms import SMS
  from resources.hello_world import HelloWorld
  
  app = Flask(__name__)
  api = restful.Api(app)
  
  api.add_resource(HelloWorld, '/')
  api.add_resource(SMS, '/sms')
  
  if __name__ == '__main__':
      app.run()
  
new_contents: from flask import Flask
  from flask.ext import restful
  from resources.hello_world import HelloWorld
  from resources.sms import SMS
  from resources.users import Users
  
  app = Flask(__name__)
  api = restful.Api(app)
  
  api.add_resource(HelloWorld, '/')
  api.add_resource(Users, '/users')
  api.add_resource(SMS, '/sms')
  
  if __name__ == '__main__':
      app.run(debug=True)
  
subject: Add route for users