Email Notifications to Telegram using Temporary HTML URL Hosting via GitHub Gist

Overview This workflow automates the process of notifying users about new emails via Telegram and temporarily hosting the email content on a secret HTML page. It is ideal for users who need immediate notifications and a secure, temporary web view of their email content. Use Cases Immediate notification of new emails in Telegram with the ability to preview the email content in a secure, temporary HTML format. Automation for users who need to keep track of their emails without constantly checking their email client. Useful for teams or individuals who require instant updates on critical emails and prefer a quick preview through a web interface. My Personal Use Case: Secure Subscription Sharing

Help me set up the n8n workflow "Email Notifications to Telegram using Temporary HTML URL Hosting via GitHub Gist" (https://n8n.io/workflows/2080). It uses: HTTP Request, Telegram. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.