How to get langgraph_user_id

I am getting this error in Lesson 3 - Email assistant with semantic memory
TypeError: “Could not resolve authentication method. Expected either api_key or auth_token to be set. Or for one of the X-Api-Key or Authorization headers to be explicitly omitted”

Tried creating an account on Landsmith to get the user id but could not find one.

In the video, the instructor says we can use anything. Could you please specific how can we get this?

The answer to your question can be found on LangChain >products > LangSmith> setting > API Keys.

Additional useful resources on this topic are also available in the three short courses offered on the DeepLearning.AI platform in collaboration with LangChain: AI Agents in LangGraph, Functions, Tools, and Agents with Langchain and LangChain for LLM Application Development

Hoping this can help you