init method
Implementation
@override
Future<void> init() async {
_client = await clientViaApplicationDefaultCredentials(
scopes: [FirestoreApi.cloudPlatformScope, FirestoreApi.datastoreScope],
);
if (cachingClient != null) {
cachingClient!.inner = _client;
api = FirestoreApi(cachingClient!);
} else {
api = FirestoreApi(_client);
}
}