When you first add a Google Drive card to a Flow, you will need to create a configuration. This will allow you to connect to your account, save your account information, and reuse that configuration next time you build a Flow with the connector. You won't have to sign in every time you want to build a Flow with this connector. Instead, use the configuration you have already set up. You can create and save multiple configurations and share them with your teammates.
To set up a new configuration in Google Drive:
Enter in an Account Nickname. This should be unique. If you are connecting multiple Google Drive accounts, then you'll be able to tell them apart.
Click Create to finish this configuration.