问YouTube分析应用编程接口刷新令牌限制

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if os.path.exists(self.token):
        print('Loading Credentials From File...')
        with open(self.token, 'rb') as token:
            self.credentials = pickle.load(token)


    if not self.credentials or not self.credentials.valid:

        if self.credentials and self.credentials.expired and self.credentials.refresh_token:
            
            print('Refreshing Access Token...')
            self.credentials.refresh(Request())
            
        else:
            
            print('Fetching New Tokens...')
            flow = InstalledAppFlow.from_client_secrets_file(self.secret_file, self.scopes)
            self.credentials = flow.run_console()

            print(self.credentials.to_json())

            # Save the credentials for the next run
            with open(self.token, 'wb') as f:
                
                print('Saving Credentials for Future Use...')
                pickle.dump(self.credentials, f)