GEOCODING is not working

Hi,
the spots do not appear on the ww map.
I got very few requests in my GCP geocoding API.
My credits remains unchanged.

   "error_message" : "You must use an API key to authenticate each request to Google Maps Platform APIs. For additional information, please refer to http://g.co/dev/maps-no-account",
   "results" : [],
   "status" : "REQUEST_DENIED"

Any idea?
Thx