input: Write a function to generate a basic REST API with authentication and endpoints in Python using Flask. If the API has an authentication mechanism, ensure it includes JWT (JSON Web Token) for protected endpoints. The API should include endpoints to handle basic CRUD operations for items. If the API setup is successful, return the Flask app object.
  
  
  from flask import Flask, request
  from flask_restful import Resource, Api
  from flask_jwt import JWT, jwt_required
  
  items = []
  
  def create_rest_api():
   app = Flask(__name__)
   api = Api(app)
  
   app.secret_key = 'super-secret-key'
   jwt = JWT(app, authenticate, identity)
  
   class Item(Resource):
   @jwt_required()
   def get(self, name):
   for item in items:
   if item['name'] == name:
   return item
   return {'item': None}, 404
  
   def post(self, name):
   new_item = {'name': name, 'price': 12.00}
   items.append(new_item)
   return new_item, 201
  
   class ItemList(Resource):
   def get(self):
   return {'items': items}
  
   api.add_resource(Item, '/item/<string:name>')
   api.add_resource(ItemList, '/items')
  
   return app
  
  assert isinstance(create_rest_api(), Flask) == True
  
output: 
  def create_rest_api():
   app = Flask(__name__)
   api = Api(app)
  
   app.secret_key = 'super-secret-key'
   jwt = JWT(app, authenticate, identity)
  
   class Item(Resource):
   @jwt_required()
   def get(self, name):
   for item in items:
   if item['name'] == name:
   return item
   return {'item': None}, 404
  
   def post(self, name):
   new_item = {'name': name, 'price': 12.00}
   items.append(new_item)
   return new_item, 201
  
   class ItemList(Resource):
   def get(self):
   return {'items': items}
  
   api.add_resource(Item, '/item/<string:name>')
   api.add_resource(ItemList, '/items')
  
   return app
  