Drive-To-Store Lead Generation (with coupon) with Google Sheets & SuiteCRM

Drive-to-Store is a multi-channel marketing strategy that includes both the web and the physical context, with the aim of increasing the number of customers and sales in physical stores. This strategy guides potential customers from the online world to the physical point of sale through the provision of a coupon that can be spent in the store or on an e-commerce site. The basic idea is to have a landing page with a form and a series of unique coupons to assign to leads as a "reward" for filling out the form. This workflow is ideal for businesses looking to automate lead generation and management, especially when integrating with CRM systems like SuiteCRM and using Google Sheets for data trac

Help me set up the n8n workflow "Drive-To-Store Lead Generation (with coupon) with Google Sheets & SuiteCRM" (https://n8n.io/workflows/2890). It uses: Google Sheets, HTTP Request. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.