Create document/image to firebase storage

Hi there,

I want to add an action to enable users upload image to firebase storage and I've done the following steps.

1. Create a collection "phtos" in Flutterflow collection with fileds "Name" and "img_url"
   

   

2. Create actions "Uploade File to Firebase" and "Backend call - create document" in Flutterflow
   

   

   When I test the app and clicke the button, all images are uploaded to Firebase storage "users" instead of phtos. Why? Can someone help me to figure out? Thank you.

Here is the rule of my Firebase storag.