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Flutter Firebase Authentication Example — showing a Home screen if logged in

This is a Flutter Firebase authentication example (using firebase_auth) were we are showing a Home screen (widget) if logged in and another screen (widget) if logged out. The relevant important dart code for actually listening if the user is logged in or not can be found at the highlighted lines. I am using firebase_auth: ^1.1.3 …

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method ‘[]’ can’t be unconditionally invoked because the receiver can be ‘null’ with Firestore

If you are working with null safety in Dart and Flutter then I recommend checking this documentation out which explains various small fixes if you have problems working with null values and null safety. Usually you can just simply use the exclamation mark just before a property to check any other value if it also …

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