Connecting Plasmic to database backends

Hi all,
Is there any tutorial about user auth & how to connect plasmic to database like Firebase / airtable?

You should be able to connect your plasmic component with any data source as usually done in react component.
You can simply add the Firebase/Airtable logic in the Wrapper component provided when you sync your Plasmic Component

This link has details about react firebase integration. You can replace the react component in examples with your Plasmic design components.