get gs_access_key and gs_secret_key in gc_storage module

[Eka Cahya Pratama]

Hi I'm trying to download non public file in google cloud bucket using gc_storage module but I can't get the gs_access_key and gs_secret_key required by gc_storage module to operate. How I can get gs_access_key and gs_secret_key in google cloud? My Setting looks like this :

name: Pull app from storage
  gc_storage:
    bucket: kurio-services
    object: gs://kurio-services/westeros/{{ westeros_zip }}
    mode: get
    dest: /tmp
    gs_access_key: 
    gs_secret_key: