Add a document to firestore

I am trying to add a document to firestore from my app in gdev. I can update fields and I can delete documents from firestore, but I can not add a document to firestore from gdev to safe my live. Someone please help.

Thanks

Hi,
Did you use this option?
image
What does it say?

im having same issue. the callback remains blank for some reason. i think i’m not formatting as intended???