How can i user second firebase project in my flutter app?

Question

I am working in project which has already built and has a firebase project but now I want to add social authentication of Twitter into this app for which I have to create another firebase project because i don't have the access to first firebase project but I don't know how to connect second firebase project in the same app. How to connect firebase project to the same app. And my second question is: Can we do Twitter authentication without using firebase? if yes then how?

Answer 1

While not yet documented specifically for Flutter, the process is very similar for all supported platforms and documented in using multiple projects in your application . The crux is that you create a separate FirebaseApp instance for each project, and then access the services for the correct project through the corresponding instance.

For Flutter, the code would look something like this:

var app1 = await Firebase.initializeApp(
  options: const FirebaseOptions(
    apiKey: '...',
    appId: '...',
    ...
  )
);
var app2 = await Firebase.initializeApp(
  options: const FirebaseOptions(
    apiKey: '...',
    appId: '...',
    ...
  )
);