How to use env vars GS_ACCESS_KEY_ID and GS_SECRET_ACCESS_KEY with Ansible?

I set the environment variables GS_ACCESS_KEY_ID and GS_SECRET_ACCESS_KE executing the command like this:

export GS_ACCESS_KEY_ID="GOOBLAHBLAH...BLAHBLAHKJO"
export GS_SECRET_ACCESS_KEY="kksBLAH...BLAHrSh"

but when Ansible execute...

- name: Create a bucket with key as directory
  gc_storage:
    bucket: "my-bucket"
    mode: "create"
    force: "no"
    region: "US-EAST1"
    object: "/imagenes3/avisos/13"
  ignore_errors: yes

Ansible show me an error saying:

TASK [Create a bucket with key as directory]***************

failed: [localhost] (item=storage_directories) => {"changed": false, "item": "storage_directories", "msg": "missing required arguments: gs_secret_key, gs_access_key"}

does anybody know why the gc_storage module in Ansible is not taking the env vars?

I'm using Ansible 2.7.0 in Ubuntu.

thank you!