fix: Authentication provider credentials are usable across Parse Server apps; fixes security vulnerability [GHSA-837q-jhwx-cmpv](https://github.com/parse-community/parse-server/security/advisories/GHSA-837q-jhwx-cmpv) (#9668)

src/Adapters/Auth/google.js

@@ -1,3 +1,47 @@
+/**
+ * Parse Server authentication adapter for Google.
+ *
+ * @class GoogleAdapter
+ * @param {Object} options - The adapter configuration options.
+ * @param {string} options.clientId - Your Google application Client ID. Required for authentication.
+ *
+ * @description
+ * ## Parse Server Configuration
+ * To configure Parse Server for Google authentication, use the following structure:
+ * ```json
+ * {
+ *   "auth": {
+ *     "google": {
+ *       "clientId": "your-client-id"
+ *     }
+ *   }
+ * }
+ * ```
+ *
+ * The adapter requires the following `authData` fields:
+ * - **id**: The Google user ID.
+ * - **id_token**: The Google ID token.
+ * - **access_token**: The Google access token.
+ *
+ * ## Auth Payload
+ * ### Example Auth Data Payload
+ * ```json
+ * {
+ *   "google": {
+ *     "id": "1234567",
+ *     "id_token": "xxxxx.yyyyy.zzzzz",
+ *     "access_token": "abc123def456ghi789"
+ *   }
+ * }
+ * ```
+ *
+ * ## Notes
+ * - Ensure your Google Client ID is configured properly in the Parse Server configuration.
+ * - The `id_token` and `access_token` are validated against Google's authentication services.
+ *
+ * @see {@link https://developers.google.com/identity/sign-in/web/backend-auth Google Authentication Documentation}
+ */
+
 'use strict';
 
 // Helper functions for accessing the google API.