How to save data from Firestore into string and use it localy [duplicate]

Question

reference.get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
    @Override
    public void onComplete(@NonNull Task<DocumentSnapshot> task) {
        if(task.getResult().exists()){
            SkinType = task.getResult().getString("SkinType");
        

        }
    }
});

I want to use SkinType String out of the method on complete