Exception: langchain_user_id is not set

[damianportillo]

When using the example of provides, I get the following exception with the error, here:

@app.route('/')
def index():
--> langchain_memory.set_user_id("abc123")
return "Hello, World!"

127.0.0.1 - - [05/Jan/2024 14:01:07] "GET / HTTP/1.1" 500 -
Traceback (most recent call last):
File "c:\Users\Damian\Develope\Python\Llm\PROTON\venv\lib\site-packages\flask\app.py", line 1478, in call
return self.wsgi_app(environ, start_response)
File "c:\Users\Damian\Develope\Python\Llm\PROTON\venv\lib\site-packages\flask\app.py", line 1458, in wsgi_app
response = self.handle_exception(e)
File "c:\Users\Damian\Develope\Python\Llm\PROTON\venv\lib\site-packages\flask\app.py", line 1455, in wsgi_app
response = self.full_dispatch_request()
File "c:\Users\Damian\Develope\Python\Llm\PROTON\venv\lib\site-packages\flask\app.py", line 869, in full_dispatch_request
rv = self.handle_user_exception(e)
File "c:\Users\Damian\Develope\Python\Llm\PROTON\venv\lib\site-packages\flask\app.py", line 865, in full_dispatch_request
rv = self.preprocess_request()
File "c:\Users\Damian\Develope\Python\Llm\PROTON\venv\lib\site-packages\flask\app.py", line 1239, in preprocess_request
rv = self.ensure_sync(before_func)()
File "C:\Users\Damian\Develope\Python\Llm\PROTON\FlaskLangchain\flask_langchain\extension.py", line 226, in before_request
langchain_conversation_id = self._create_new_conversation_id()
File "C:\Users\Damian\Develope\Python\Llm\PROTON\FlaskLangchain\flask_langchain\extension.py", line 270, in _create_new_conversation_id
raise Exception("langchain_user_id is not set")
Exception: langchain_user_id is not set