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+Google Authentication
+=====================
+
+Requirements
+------------
+
+OAuth Google API credentials (available in the Google Developer Console)
+
+How does this work?
+-------------------
+
+- The Google authentication in Kanboard use the OAuth 2.0 protocol
+- Any user account in Kanboard can be linked to a Google Account
+- When a Kanboard user account is linked to Google, you can login with one click
+
+Procedure to link a Google Account
+----------------------------------
+
+1. Go to your user profile
+2. Click on **External accounts**
+3. Click on the link **Link my Google Account**
+4. You are redirected to the **Google Consent screen**
+5. Authorize Kanboard by clicking on the button **Accept**
+6. Your account is now linked
+
+Now, on the login page you can be authenticated in one click with the link **Login with my Google Account**.
+
+Your name and email are automatically updated from your Google Account.
+
+Installation instructions
+-------------------------
+
+### Setting up OAuth 2.0 in Google Developer Console
+
+- Follow the [official Google documentation](https://developers.google.com/accounts/docs/OAuth2Login#appsetup) to create a new application
+- In Kanboard, you can get the **redirect url** in **Settings > Integrations > Google Authentication**
+
+### Setting up Kanboad
+
+Create a custom `config.php` file or copy the `config.default.php` file:
+
+```php
+<?php
+
+// Enable/disable Google authentication
+define('GOOGLE_AUTH', true); // Set this value to true
+
+// Google client id (Get this value from the Google developer console)
+define('GOOGLE_CLIENT_ID', 'YOUR_CLIENT_ID');
+
+// Google client secret key (Get this value from the Google developer console)
+define('GOOGLE_CLIENT_SECRET', 'YOUR_CLIENT_SECRET');
+```
+
+Notes
+-----
+
+Kanboard use these information from your Google profile:
+
+- Full name
+- Email address
+- Google unique id
+
+The Google unique id is used to link together the local user account and the Google account.