How to make dynamic sessionid in memory parameter?

[birinm16]

I don't know if my question is correct, but i need help.

So, my goal is actually to keep chat history and memory based on user.
I use the upstash redis-backed chat memory. The conversation is saved in upstash based on userid that I set manually in node. But, i want to make it dynamic. Where the user id is collected from user. So, in the begining chatbot will ask userid, then user input his userid, and chatbot will get the conversation and save conversation based on this userid on upstash.

can anyone help on this?