Flutter firebase chat integration in flutter app without google signin - flutter

I am developing an application for users signing up with their mobile numbers. Now I have to develop a chat module in my app How to integrate flutter firebase chat without google sign-in.
I have tried with the anonymous sign but the user's chat is not stored in firebase. May I know the steps to use firebase chat in-app and how to integrate firebase without manual google sign into my application?

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Firebase authentication problem with Apple sign in

I'm using firebase authentication in a flutter app.
I've set up apple authentication and I'm building for both web and for ios.
In the apple developer console, I have an app id (com.crossology.ios) and an associated services id (com.crossology.auth)
In the firebase console, if I set authentication > apple > services id to "com.crossology.ios", authentication works in my flutter app.
If I set it to "com.crossology.auth", authentication works on my flutter web interface.
I don't see a way to configure apple authentication to work for both web and app at the same time.

Do I need a Firebase project to use Firebase App Check?

I want to secure my own custom API for my Flutter app.
I came across Firebase App Check, but I do not want to use Firebase.
Can I use Firebase App Check without a Firebase project? It seems to like there is not Firebase involved. Only other app attestation services. https://firebase.google.com/docs/app-check/flutter/custom-resource
Do I need a Firebase project to use Firebase App Check?
Yes.
It seems to like there is not Firebase involved. Only other app attestation services.
Firebase is not an attestation provider but it uses others providers and it's a bit easier to integrate those providers using Firebase SDK than directly using them. e.g reCAPTCHA v3 for web apps.
Once you integrate the Firebase App Check SDK in your Flutter app, you'll have to get the App Check token using getToken() and add it in your API request. Then you just need to verify the token in your backend using the Firebase Admin SDK.

How to integrate Facebook Pixel Sdk in flutter

I want to integrate the facebook pixel sdk in flutter. Can anyone help me that how i can integrate that in my flutter project
For native app development, Facebook SDK is required.
Flutter Facebook Login Package will provide you, not only the login but also the required SDK.
Next, Facebook_App_Events Package, which is going to help you in sending tracked data to FB, for eg. when a person clicks to watch a video on your app or makes a purchase etc.
An app event is an action that takes place in your app or on your web
page such as a person installing your app or completing a purchase.
Facebook App Events allows you to track these events to view
analytics, measure ad performance, and build audiences for ad
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Flutter auth ui facebook sdk issue

An issue with Facebook SDK
When I am trying to using flutter firebase auth UI
The app is crashing and I identify that it is because of facebook SDK setup and I am not interested in using Facebook login Is there any other soluction available for getting flutter firebase ui with google login, email login,phone login only