input: 
  def create_basic_rest_api():
      """
      This function generates a basic REST API with authentication and endpoints using Flask. The API includes JWT authentication, and allows for GET and POST requests to manage a list of items.
      
      Example:
      >>> create_basic_rest_api()
      # The API can be tested with routes like '/item/<name>' and '/items'.
      """
  
output:     
      from flask import Flask, jsonify, request
      from flask_jwt_extended import JWTManager, jwt_required, create_access_token
      from flask_restful import Api, Resource
  
      app = Flask(__name__)
      app.config['JWT_SECRET_KEY'] = 'super-secret'  # Change this in production
      jwt = JWTManager(app)
      api = Api(app)
  
      items = []
  
      class Item(Resource):
          @jwt_required()
          def get(self, name):
              item = next(filter(lambda x: x['name'] == name, items), None)
              return {'item': item}, 200 if item else 404
  
          @jwt_required()
          def post(self, name):
              if next(filter(lambda x: x['name'] == name, items), None):
                  return {'message': "An item with name '{}' already exists.".format(name)}, 400
              data = request.get_json()
              item = {'name': name, 'price': data['price']}
              items.append(item)
              return item, 201
  
      class ItemList(Resource):
          @jwt_required()
          def get(self):
              return {'items': items}
  
      api.add_resource(Item, '/item/<string:name>')
      api.add_resource(ItemList, '/items')
  
      @app.route('/login', methods=['POST'])
      def login():
          username = request.json.get('username', None)
          password = request.json.get('password', None)
          if username != 'admin' or password != 'password':
              return jsonify({"msg": "Bad username or password"}), 401
          access_token = create_access_token(identity=username)
          return jsonify(access_token=access_token)
  
      if __name__ == '__main__':
          app.run(debug=True)
  