title: Can I use firebase for only auth and any other SQL database to store other user data?
body: <p>Basically I am building a social media type app. I want to manage the auth using firebase firestore (as It is easier) and the contents posted by the user in any other SQL database. Like, if the user uploads a image it will be stored in my own database. Is it possible to link firebase with my own database? If yes, then how?</p>