How to passing user info from the mobile app or web app to langchain via langserve?

[kientv]

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Example Code

add_routes(app, chain, path="/", input_type=ChatRequest, config_keys=["configurable"], enabled_endpoints=("invoke"))

Description

I want to langchain aware about user info like fullname, age, ...

System Info

langchain==0.3.0
langchain-community==0.3.0
langchain-core==0.3.21
langchain-google-genai==2.0.6
langchain-google-vertexai==2.0.8
langchain-openai==0.2.2
langchain-text-splitters==0.3.0