feat(Google Chat Node): Updates (#12827)

Co-authored-by: Dana <152518854+dana-gill@users.noreply.github.com>

packages/nodes-base/credentials/GoogleChatOAuth2Api.credentials.ts

@@ -0,0 +1,26 @@
+import type { ICredentialType, INodeProperties } from 'n8n-workflow';
+
+const scopes = [
+	'https://www.googleapis.com/auth/chat.spaces',
+	'https://www.googleapis.com/auth/chat.messages',
+	'https://www.googleapis.com/auth/chat.memberships',
+];
+
+export class GoogleChatOAuth2Api implements ICredentialType {
+	name = 'googleChatOAuth2Api';
+
+	extends = ['googleOAuth2Api'];
+
+	displayName = 'Chat OAuth2 API';
+
+	documentationUrl = 'google/oauth-single-service';
+
+	properties: INodeProperties[] = [
+		{
+			displayName: 'Scope',
+			name: 'scope',
+			type: 'hidden',
+			default: scopes.join(' '),
+		},
+	];
+}