In order to connect a Google Analytics account as a datasource for Klar you need the following information:
A Google Analytics 4 Property ID
Authorization via Google Authentication (OAuth)
1. Go to https://analytics.google.com and login with the account you want to connect to Klar as a datasource.
2. Click on the selector in the bottom left corner on the Admin button: and navigate to "Admin - Property - Property Details"
3. Your property ID is to be found in the top right.
4. Copy the property ID and go to KLAR "Settings - Store Configurator - Data Sources"
5. Connect a new data source.
6. Choose Google Analytics 4 and enter a name and the property ID.
7. Press Connect and authentify for the data source and allow the connection.