I updated the LoginOnly Thunkable app which can be used as a template for any app you build that requires user login. Check out the updated tutorial which instructs you on how to use this template app to create your own apps.

The app uses Thunkable’s drag and drop interface, Firebase for login, and Cloudinary to store profile pics for users. You can create the app in about 30 minutes including setting up free accounts at Thunkable, Firebase, and Cloudinary.