Step 1 : Click on Integrations tab in left menu, and then click on Add Integration button to add new integration.

Step 2 : Select Blogger from the select list and click on Save Integration

Step 3 : Once Clicked on Save Integration, Page will be redirected to Google Authentication / Login, once the permission request is displayed please click on allow to complate the integration.

Step 4: Once you click allow the integration will complete and it will be listed as below screenshot