Google APIs use the OAuth 2.0 protocol for authentication and authorization. Google supports common OAuth 2.0 scenarios such as those for web servers, installed, and client-side applications.
Etlworks connectors for Google services support the OAuth 2.0 scenario for web servers.
To connect to the Google service using OAuth2 protocol you will need to select OAuth2 as an Authentication type and click Sign in with Google.
Then login using Google account and authorize the Etlworks app to access the specific service, for example, Google Analytics on behalf of the user that owns the account.