Vue.js 3 and Firebase for Beginners - Detecting Auth Changes

The video tutorial covers implementing Firebase authentication using email and password, and introduces the use of Firebase observers to track user state changes. It explains how to conditionally handle user data based on login status and adjust UI elements accordingly. The tutorial also includes testing the implementation and making necessary adjustments, highlighting the use of JavaScript optional chaining to handle potential errors.

What is the purpose of the 'user data' variable in the context of the authentication process?

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What is the significance of using optional chaining in the code?

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What happens when a user logs out in terms of the user data?

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