How to use Firebase on Flutter and Swift?

[hahai96]

I'm using FireStore on Flutter and Swift, but when I build I get an error Terminating app due to uncaught exception 'FIRIllegalStateException', reason: 'Firestore instance has already been started and its settings can no longer be changed. You can only set settings before calling any other methods on a Firestore instance.'
This seems to be because Flutter initialized the Firestore with the statement Firebase.initializeApp. Has anyone encountered this problem, please help

[akshatshah-1]

@hahai96 did you find any solution for this? I have the same issue.