Service account credentials are like a special ID card made on Google Cloud console, and you use it to show your app is legit. This can even get you pre-approved access to secure data, such as with Google Analytics when you add the service account email as a user. But just a heads up, you can’t use a typical Gmail account for this. You’ll need to use something called ‘oauth2’ to ask the boss or user of the Google Analytics account for access.