input: 
  def generate_basic_rest_api() -> None:
      """Generates a basic REST API with authentication and endpoints using Python and Flask.
      The API includes JWT-based authentication and provides endpoints to manage items.
      The application also includes a secret key for JWT.
      
      Example:
      >>> # Running the API will provide endpoints such as:
      >>> # GET /item/<name> # Requires JWT authentication
      >>> # POST /item/<name>
      >>> # GET /items
      """
  
output:     
      from flask import Flask, request, jsonify
      from flask_jwt_extended import JWTManager, jwt_required, create_access_token
      from flask_restful import Api, Resource
  
      app = Flask(__name__)
      api = Api(app)
      app.config['JWT_SECRET_KEY'] = 'super-secret'  # Change this in production
      jwt = JWTManager(app)
  
      items = {}
  
      class Item(Resource):
          @jwt_required()
          def get(self, name):
              if name in items:
                  return items[name]
              return {'message': 'Item not found'}, 404
  
          def post(self, name):
              if name in items:
                  return {'message': "An item with name '{}' already exists.".format(name)}, 400
              data = request.get_json()
              items[name] = data
              return items[name], 201
  
      class ItemList(Resource):
          @jwt_required()
          def get(self):
              return {'items': items}
  
      api.add_resource(Item, '/item/<string:name>')
      api.add_resource(ItemList, '/items')
  
      if __name__ == '__main__':
          app.run(debug=True)
  