Google Cloud authentication method

1. Add the reusable authentication method:
   1. Click the Libraries drop-down menu and select Authentication Methods.
   2. Click the Add Authentication Method drop-down menu and select Google Cloud.
2. Provide a unique name for the authentication method.
3. Optionally, enter a description to help identify the purpose or scope of this method.
4. Select the Authentication Type:
   • HMAC: Enter the following information:
     • Access ID: Enter the access ID.
     • Secret: Enter the secret.
   • OAuth 2.0: Select one of the following:
     • Upload JSON File: Upload a JSON configuration file.
     • Enter Manually: Enter the following information:
       • Client ID: Enter the client ID issued by the OAuth provider.
       • Private Key: Enter the private key.
5. Save the new authentication method.