Log-in with your account to n8n, and start creating a workflow.
Once you want to add your assistant, click on +, and search for understand tech in the nodes.
Select Understand Tech Chat, and click on Send message a chat.
A new window will open, where you will need to:
A. Select Credential: Click on Create new credential and add your API Key.
B. Choose Model name: Give your model any name you want, e.g.: Example Assistant
C. Fill in your Prompt: Write the message or instruction that will be sent to the model
That's it !
This is an example of how your workflow could look: