Automate LINE & Google account linking with OAuth2 authentication

LINE x Google Account Linking Workflow

This workflow automates the process of linking a new user on your LINE Official Account to their Google Account. When a user adds your LINE account as a friend, this workflow automatically sends them a message with a unique authentication link. After the user approves the connection, their Google profile information is fetched, and a confirmation message is sent, completing the loop.

Prerequisites

Before you begin, ensure you have the following:

An n8n instance: Either on n8n.cloud or a self-hosted environment. A LINE Developers Account: A Messaging API channel. Your Channel Access Token (long-lived). A Google Cloud Platform (GCP) Account: A configured OAuth consent screen. An OAuth 2.0 Client ID and Client Secret.

Setup Instructions

Follow these steps to configure the workflow.

Step 1: Configure LINE Developers Console