(Traceback (most recent call last):
  File "C:\Users\user\OneDrive\Desktop\bookcode\book_app\book_env\Lib\site-packages\redis\connection.py", line 357, in connect
    sock = self.retry.call_with_retry(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\user\OneDrive\Desktop\bookcode\book_app\book_env\Lib\site-packages\redis\retry.py", line 62, in call_with_retry
    return do()
           ^^^^
  File "C:\Users\user\OneDrive\Desktop\bookcode\book_app\book_env\Lib\site-packages\redis\connection.py", line 358, in <lambda>
    lambda: self._connect(), lambda error: self.disconnect(error)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\user\OneDrive\Desktop\bookcode\book_app\book_env\Lib\site-packages\redis\connection.py", line 730, in _connect
    raise err
  File "C:\Users\user\OneDrive\Desktop\bookcode\book_app\book_env\Lib\site-packages\redis\connection.py", line 718, in _connect
    sock.connect(socket_address)
ConnectionRefusedError: [WinError 10061] No connection could be made because the target machine actively refused it

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\user\OneDrive\Desktop\bookcode\book_app\book_env\Lib\site-packages\flask\app.py", line 1498, in __call__
    return self.wsgi_app(environ, start_response)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\user\OneDrive\Desktop\bookcode\book_app\book_env\Lib\site-packages\flask\app.py", line 1476, in wsgi_app
    response = self.handle_exception(e)
               ^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\user\OneDrive\Desktop\bookcode\book_app\book_env\Lib\site-packages\flask\app.py", line 1473, in wsgi_app
    response = self.full_dispatch_request()
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\user\OneDrive\Desktop\bookcode\book_app\book_env\Lib\site-packages\flask\app.py", line 883, in full_dispatch_request
    return self.finalize_request(rv)
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\user\OneDrive\Desktop\bookcode\book_app\book_env\Lib\site-packages\flask\app.py", line 904, in finalize_request
    response = self.process_response(response)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\user\OneDrive\Desktop\bookcode\book_app\book_env\Lib\site-packages\flask\app.py", line 1284, in process_response
    self.session_interface.save_session(self, ctx.session, response)
  File "C:\Users\user\OneDrive\Desktop\bookcode\book_app\book_env\Lib\site-packages\flask_session\base.py", line 305, in save_session
    self._upsert_session(app.permanent_session_lifetime, session, store_id)
  File "C:\Users\user\OneDrive\Desktop\bookcode\book_app\book_env\Lib\site-packages\flask_session\redis\redis.py", line 81, in _upsert_session
    self.client.set(
  File "C:\Users\user\OneDrive\Desktop\bookcode\book_app\book_env\Lib\site-packages\redis\commands\core.py", line 2335, in set
    return self.execute_command("SET", *pieces, **options)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\user\OneDrive\Desktop\bookcode\book_app\book_env\Lib\site-packages\redis\client.py", line 559, in execute_command
    return self._execute_command(*args, **options)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\user\OneDrive\Desktop\bookcode\book_app\book_env\Lib\site-packages\redis\client.py", line 565, in _execute_command
    conn = self.connection or pool.get_connection(command_name, **options)
                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\user\OneDrive\Desktop\bookcode\book_app\book_env\Lib\site-packages\redis\connection.py", line 1422, in get_connection
    connection.connect()
  File "C:\Users\user\OneDrive\Desktop\bookcode\book_app\book_env\Lib\site-packages\redis\connection.py", line 363, in connect
    raise ConnectionError(self._error_message(e))
redis.exceptions.ConnectionError: Error 10061 connecting to 127.0.0.1:6379. No connection could be made because the target machine actively refused it.