This is my latest attempt at the code:\n```from superset import appbuilder\nfrom flask_appbuilder.api import BaseApi, expose, protect, safe\n\nclass ExampleApi(BaseApi):\n\n    resource_name = 'greeting'\n\n    @expose('', methods=["GET"])\n    @safe\n    def greeting(self):\n        return self.response(200, message="Hello")\n\n\nappbuilder.add_api(ExampleApi)```