Call analyzer with AssemblyAI transcription and OpenAI assistant integration

Video Guide I prepared a detailed guide that showed the whole process of building a call analyzer. .png) Who is this for? This workflow is ideal for sales teams, customer support managers, and online education services that conduct follow-up calls with clients. It’s designed for those who want to leverage AI to gain deeper insights into client needs and upsell opportunities from recorded calls. What problem does this workflow solve? Many follow-up sales calls lack structured analysis, making it challenging to identify client needs, gauge interest levels, or uncover upsell opportunities. This workflow enables automated call transcription and AI-driven analysis to generate actionable insights,

Help me set up the n8n workflow "Call analyzer with AssemblyAI transcription and OpenAI assistant integration" (https://n8n.io/workflows/2547). It uses: HTTP Request, Supabase. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.