Google API javacript : I am doing a custom google map with API 

I put the URL link : https://maps.googleapis.com/maps/api/staticmap?center=Brooklyn+Bridge,New+York,NY&zoom=13&size=600x300&maptype=roadmap&markers=color:blue|label:S|40.702147,-74.015794&markers=color:green|label:G|40.711614,-74.012318&markers=color:red|label:C|40.718217,-73.998284&key=AIzaSyCTFUKmdIRSSod5v1oqhIXJOmkOPMsdFp0 

I received this error: 

The Google Maps Platform server rejected your request. This API project is not authorized to use this API. Please ensure this API is activated in the Google Developers Console: https://console.developers.google.com/apis/api/static_maps_backend?project=_

I enabled API AND THE error still exist 
Can you please help me find the solituion for my problem 