Protect PDF with the password using ConvertAPI

Who is this for? For developers and organizations that need to protect PDF files with the password. What problem is this workflow solving? PDF file protection problem. What this workflow does Downloads the PDF file from the web. Protects PDF file with the password. Stores the PDF file in the local file system. How to customize this workflow to your needs Open the HTTP Request node. Adjust the URL parameter (all endpoints can be found here). Use your API Token for authentication. Pass the token in the Authorization header as a Bearer token. You can manage your API Tokens in the User panel → Authentication. Change the password in the parameter UserPassword Optionally, additional Body Parameter

Help me set up the n8n workflow "Protect PDF with the password using ConvertAPI" (https://n8n.io/workflows/2306). It uses: HTTP Request, Google Drive. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.