This course has been updated! We now recommend you take the Firebase Fundamentals course.

Check out a free preview of the full Firebase + React: Real-time, Serverless Web Apps course:
The "Authentications and Signons" Lesson is part of the full, Firebase + React: Real-time, Serverless Web Apps course featured in this preview video. Here's what you'd learn in this lesson:

Listening to authentication changes, Steve sets the application to log in or log out a user depending on the state change.

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