To get OAuth credentials from Google (for Gmail SMTP or Gmail API access), follow these steps through the Google Cloud Console:

✅ Step-by-Step: Create OAuth 2.0 Credentials

1. Go to Google Cloud Console.
2. Create or select a project (top-left corner dropdown).
3. On the sidebar, go to "APIs & Services" > "OAuth consent screen":
   • Choose "External" if you're building for users outside your organization.
   • Fill out the App name, User support email, and Developer contact info.
   • Save and Continue through scopes and test users (for test mode, add your Gmail address as a test user).
4. Go to "APIs & Services" > "Credentials".
5. Click "+ CREATE CREDENTIALS" > "OAuth 2.0 Client ID".
6. Select Application type:
   • For most web apps or installed apps: choose Desktop app or Web application.
7. Give it a name and set redirect URIs (if applicable):
   • For testing: http://localhost or a loopback URI.
   • For production: use your domain’s actual URI.
8. Click Create – you'll be given:
   • Client ID
   • Client Secret
9. Download the JSON file – it contains the credentials you'll need in your app.

🔐 What You’ll Use:

• Client ID and Client Secret for the OAuth flow.
• Use Google's OAuth 2.0 Playground to test scopes and token generation if you're experimenting.

Let me know what platform or language you're using, and I can walk you through integrating these credentials with Gmail SMTP or Gmail API.