fix(docs): update Google OAuth credential docs (#4367)

Co-authored-by: cubic-dev-ai[bot] <191113872+cubic-dev-ai[bot]@users.noreply.github.com>

_snippets/integrations/builtin/credentials/google/create-google-cloud-project.md

@@ -1,6 +1,6 @@
 1. Log in to your [Google Cloud Console](https://console.cloud.google.com) using your Google credentials.
 2. In the top menu, select the project dropdown in the top navigation and select **New project** or go directly to the [New Project](https://console.cloud.google.com/projectcreate) page.
-3. Enter a **Project name** and select the **Location** for your project.
+3. Enter a **Project name** and select the location (**Organization** and/or **Parent resource**) for your project.
 4. Select **Create**.
 5. Check the top navigation and make sure the project dropdown has your project selected. If not, select the project you just created.
 

_snippets/integrations/managed-google-oauth.md

@@ -1,10 +1,12 @@
-/// note | Note for n8n Cloud users
-For the following nodes, you can authenticate by selecting **Sign in with Google** in the OAuth section: 
-
 * [Google Calendar](/integrations/builtin/app-nodes/n8n-nodes-base.googlecalendar/index.md)
+* [Google Calendar Trigger](/integrations/builtin/trigger-nodes/n8n-nodes-base.googlecalendartrigger.md)
 * [Google Contacts](/integrations/builtin/app-nodes/n8n-nodes-base.googlecontacts.md)
+* [Google Docs](/integrations/builtin/app-nodes/n8n-nodes-base.googledocs.md)
+* [Google Drive](/integrations/builtin/app-nodes/n8n-nodes-base.googledrive/index.md)
+* [Google Drive Trigger](/integrations/builtin/trigger-nodes/n8n-nodes-base.googledrivetrigger/index.md)
 * [Google Mail](/integrations/builtin/app-nodes/n8n-nodes-base.gmail/index.md)
+* [Google Mail Trigger](/integrations/builtin/trigger-nodes/n8n-nodes-base.gmailtrigger/index.md)
 * [Google Sheets](/integrations/builtin/app-nodes/n8n-nodes-base.googlesheets/index.md)
 * [Google Sheets Trigger](/integrations/builtin/trigger-nodes/n8n-nodes-base.googlesheetstrigger/index.md)
+* [Google Slides](/integrations/builtin/app-nodes/n8n-nodes-base.googleslides.md)
 * [Google Tasks](/integrations/builtin/app-nodes/n8n-nodes-base.googletasks.md)
-///

docs/integrations/builtin/credentials/google/index.md

@@ -8,12 +8,13 @@ contentType: overview
 
 This section contains:
 
-* [OAuth2 single service](/integrations/builtin/credentials/google/oauth-single-service.md): Create an OAuth2 credential for a specific service node, such as the Gmail node.
+* [OAuth2 single service](/integrations/builtin/credentials/google/oauth-single-service.md): Create an OAuth2 credential for a specific service node, such as the Gmail node. Two options exist:
-* [OAuth2 generic](/integrations/builtin/credentials/google/oauth-generic.md): Create an OAuth2 credential for use with [custom operations](/integrations/custom-operations.md).
+    * [Managed OAuth2](/integrations/builtin/credentials/google/oauth-single-service.md/#managed-oauth2): Sign in with Google directly on n8n, with no setup required on the Google Cloud Console. Available for n8n Cloud users only, for certain Google nodes.
+    * [Custom OAuth2](/integrations/builtin/credentials/google/oauth-single-service.md/#custom-oauth2): Configure an OAuth2 app in the Google Cloud Console and connect it to your n8n credential.    
+* [OAuth2 API (generic)](/integrations/builtin/credentials/google/oauth-generic.md): Create an OAuth2 credential for use with [custom operations](/integrations/custom-operations.md).
 * [Service Account](/integrations/builtin/credentials/google/service-account.md): Create a [Service Account](https://cloud.google.com/iam/docs/service-account-overview) credential for some specific service nodes.
 * [Google PaLM and Gemini](/integrations/builtin/credentials/googleai.md): Get a Google Gemini/Google PaLM API key.
 
-
 ## OAuth2 and Service Account
 
 There are two authentication methods available for Google services nodes:
@@ -21,6 +22,10 @@ There are two authentication methods available for Google services nodes:
 * [OAuth2](https://developers.google.com/identity/protocols/oauth2): Recommended because it's more widely available and easier to set up.
 * [Service Account](https://cloud.google.com/iam/docs/understanding-service-accounts): Refer to the [Google documentation: Understanding service accounts](https://cloud.google.com/iam/docs/understanding-service-accounts) for guidance on when you need a service account.
 
+### Managed OAuth2 for n8n Cloud users
+
+[Managed OAuth2](/integrations/builtin/credentials/google/oauth-single-service.md/#managed-oauth2) is available for the following Google nodes, for n8n Cloud users. This provides a simplified credential creation process:
+
 --8<-- "_snippets/integrations/managed-google-oauth.md"
 
 ## Compatible nodes

docs/integrations/builtin/credentials/google/oauth-generic.md

@@ -6,7 +6,7 @@ contentType: [integration, reference]
 
 # Google: OAuth2 generic
 
-This document contains instructions for creating a generic OAuth2 Google credential for use with [custom operations](/integrations/custom-operations.md).
+This document contains instructions for creating a generic Google OAuth2 API credential for use with [custom operations](/integrations/custom-operations.md).
 
 --8<-- "_snippets/integrations/managed-google-oauth.md"
 

docs/integrations/builtin/credentials/google/oauth-single-service.md

@@ -9,13 +9,29 @@ priority: critical
 
 This document contains instructions for creating a Google credential for a single service. They're also available as a [video](#video).
 
---8<-- "_snippets/integrations/managed-google-oauth.md"
-
 ## Prerequisites
 
 * Create a [Google Cloud](https://cloud.google.com/) account.
 
-## Set up OAuth
+## Managed OAuth2
+
+n8n Cloud users can use **Managed OAuth2** for the following nodes:
+
+--8<-- "_snippets/integrations/managed-google-oauth.md"
+
+To use **Managed OAuth2**, just click **Sign in with Google** in the credentials screen. No more setup is required in the Google Cloud Console or elsewhere.
+
+![Managed OAuth2 credentials screen](/_images/integrations/builtin/credentials/google/managed-oauth.png)
+
+If you prefer to use Custom OAuth2, use the dropdown to change the authentication type.
+
+## Custom OAuth2
+
+Managed OAuth2 isn't available for self-hosted n8n users, nor for Google nodes not listed [above](#managed-oauth2). You must create a custom OAuth2 single service credential. This means creating an app in the Google Cloud Console and connecting it to n8n with a Client ID and Client Secret.
+
+The rest of this document covers the full process.
+
+## Set up Custom OAuth2
 
 There are five steps to connecting your n8n credential to Google services:
 
@@ -67,18 +83,15 @@ Next, create the OAuth client credentials in Google:
 1. Select **+ Create credentials** > **OAuth client ID**.
 1. In the **Application type** dropdown, select **Web application**.
 1. Google automatically generates a **Name**. Update the **Name** to something you'll recognize in your console.
-1. **If you're self-hosting:** From your n8n credential, copy the **OAuth Redirect URL**. Paste it into the **Authorized redirect URIs** in Google Console. 
+1. From your n8n credential, copy the **OAuth Redirect URL**. Paste it into the **Authorized redirect URIs** in Google Console.
-If you're using **n8n cloud**, you can leave this field empty as the OAuth setup is pre-configured, and the callback URL is fixed for that configuration.
 1. Select **Create**.
 
 ### Finish your n8n credential
 
 With the Google project and credentials fully configured, finish the n8n credential:
-- If **self-hosted:**
 
 1. From Google's **OAuth client created** modal, copy the **Client ID**. Enter this in your n8n credential.
 1. From the same Google modal, copy the **Client Secret**. Enter this in your n8n credential.
-- **If n8n cloud:**
 1. In n8n, select **Sign in with Google** to complete your Google authentication.
 1. **Save** your new credentials.