Authentication

How to debug VoIP calls, SMS delivery, and phone number verification: locate the point of failure, read API responses and logs, separate signaling problems from media problems, test webhooks on their own, and trace verification codes end to end.

A working OTP flow proves your app sends and checks a code. It doesn't prove your signup holds up against bots. Here's how to test auth for fraud resistance locally with a Pinggy tunnel.

Learn how to self-host n8n using npm and configure Google Sign-In authentication. Complete guide with Pinggy tunneling for secure remote access.