firebase-tutorial | repo contains the code for the youtube playlist | Authentication library

I started this tutorial (https://www.freecodecamp.org/news/react-native-firebase-tutorial/) on Firebase and React Native. Everything is working well overall.

But I have this error: “User does not exist anymore.” for the Login. However, users are well rooted in Firebase.

Hello I am following this tutorial in order to do push notifications to multiple devices at once in Expo React Native using Firebase's cloud functions. The push tokens are stored in my RealTime-Database, but when I attempt to integrate this step after running firebase login and firebase init, I updated my index.js file to contain this code. After saving this file, I attempt to do firebase deploy and I get 70 errors. I tried to deploy it from my app directory, and didnt work, and I tried to do it from my functions directory and that didn't work. I deleted my node_modules and package-lock, and I tried to rerun expo again and clearing my npm cache. Nothing worked. I already had my firebase app initialized somewhere else, could that be the reason why? But my App itself still works, so I am not getting an error saying that the Firebase app is being initialized twice. I really dont know what else do to. Is the ESLint causing all of these errors? Should I run firebase init again without adding ESLint? Please let me know. My errors are below.

I'm following this guide: https://www.freecodecamp.org/news/react-native-firebase-tutorial/ in attempt to learn how to use firebase, and even though I've followed the code very closely, I'm receiving a NAVIGATION error:

The action 'NAVIGATE' with payload {"name":"Home","params":{"user":{"id":"AWSKEmmUsua5koR1V3x5bapc3Eq2","email":"tk@gmail.com","fullName":"t"}}} was not handled by any navigator.

Do you have a screen named 'Home'?

I do however, have a screen named Home. App.js:

I've just started learning flutter and firebase. I'm following this tutorial [https://grokonez.com/android/how-to-integrate-flutter-firebase-tutorial-app-android-studio], did everything as mentioned, but app is not being built successfully. This is the error I'm having:

I am new to Firebase and working on a small project to get better acquainted with Firebase/Firestore. Right now I'm using Firebase authentication to handle registering and signing in users. Once logged in a list of events is displayed for the user that I created in MySQL and am connecting to my Angular/Ionic app through a http call to Spring. (It was specified for me to do it this way to also learn some Java/Spring.)

I am able to display the events and click to add an event to a user specific "my events" list. I followed the tutorial here: https://javebratt.com/ionic-firebase-tutorial-object/

I'm having trouble deleting an event from the users list in Firestore. I'm able to see the specific event ID that gets added by Firestore when the user selects an event to add to "my events" with "event.id" in my *ngFor template in the html.

No matter what I do though I can't get the delete function to work properly. It actually is saying it's running successfully, but nothing is being deleted. I believe I'm missing something between the .doc() and .delete() methods but the Google docs are very vague (or I'm not grasping them correctly).

I've tried specifying a path such as