code: def init_app(self, app):
          
          app.config.setdefault('FEDORA_BASE_URL', 'http://localhost:8080')
          if hasattr(app, 'teardown_appcontext'):
              app.teardown_appcontext(self.teardown)
          else:
              app.teardown_request(self.teardown)
docs: Initializes a Flask app object for the extension.
  
          Args:
              app(Flask): Flask app