<How to initialise a variable from firebase result...

# stackoverflow

[user]

How to initialise a variable from firebase result?
I have my firestore data structure something like this.

collection(users) -> document(userID) -> {groupID: "SomeID"}

collection(groups) -> document(groupID) -> {group data}


I want to get groupID from users and access my group data on Application startup I am unable to figure it out.

I tried this in my DatabaseHelper class for Firestore.

companion object {

val selfID = FirebaseAuth.getInstance().currentUser!!.uid
val groupID = groupID()

fun groupID(): String {

var...