The debug signing certificate is optional to use Firebase with your app, but is required for Dynamic Links, Invites and Phone Authentication. Local projects package name which can be found inside of the manifest tag within the /android/app/src/main/AndroidManifest.xml
The 'Android package name' must match your On the Firebase console, add a new Android application and enter your projects details. To allow the Android app to securely connect to your Firebase project, a configuration file must be downloaded and added
# Using npm npm install -save Using Yarn yarn add module must be installed before using any other Firebase service.