Chat Assistant (OpenAI assistant) with Postgres Memory And API Calling Capabalities

Workflow Description Your workflow is an intelligent chatbot, using ++OpenAI assistant++, integrated with a backend that supports WhatsApp Business, designed to handle various use cases such as sales and customer support. Below is a breakdown of its functionality and key components: Workflow Structure and Functionality Chat Input (Chat Trigger) The flow starts by receiving messages from customers via WhatsApp Business. Collects basic information, such as sessionid, to organize interactions. Condition Check (If Node) Checks if additional customer data (e.g., name, age, dependents) is sent along with the message. If additional data is present, a customized prompt is generated, which includes t

Help me set up the n8n workflow "Chat Assistant (OpenAI assistant) with Postgres Memory And API Calling Capabalities" (https://n8n.io/workflows/2637). It uses: OpenAI, Postgres Chat Memory, HTTP Request Tool. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.