Firebase MVVM Profile Service 2

FirebaseProfileService.kt

suspend fun getFriends(userId: String): List<User> {
    val db = FirebaseFirestore.getInstance()
    return try {
        db.collection("users")
                .document(userId)
                .collection("friends").get().await()
                .documents.mapNotNull { it.toUser() }
    } catch (e: Exception) {
        Log.e(TAG, "Error getting user friends", e)
        FirebaseCrashlytics.getInstance().log("Error getting user friends")
        FirebaseCrashlytics.getInstance().setCustomKey("user id", xpertSlug)
        FirebaseCrashlytics.getInstance().recordException(e)
        emptyList()
    }
}