Import multiple CSV to Google Sheets

This workflow imports multiple CSV files and appends or updates them to a Google Sheets document. Here's a step-by-step breakdown: When clicked "Execute Workflow", the process starts. The "Read Binary Files" node reads all the '.csv' files from the specified directory. The files are then split into batches (one file in a batch) by the "Split In Batches" node. For each file, the "Read CSV" node reads the data from the CSV file. The "Assign source file name" node assigns the source file name to the data. The data is then processed by the "Remove duplicates" node. This removes any duplicate entries based on the 'username' field. The "Keep only subscribers" node filters the data to keep only tho

Help me set up the n8n workflow "Import multiple CSV to Google Sheets" (https://n8n.io/workflows/1968). It uses: Google Sheets. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.