I can't get google maps installed in my application

I followed the document here to install the native google maps SDK
I executed this
"$ ionic plugin add cordova-plugin-googlemaps --variable API_KEY_FOR_ANDROID=“YOUR_ANDROID_API_KEY_IS_HERE” --variable API_KEY_FOR_IOS=“YOUR_IOS_API_KEY_IS_HERE”

on google dashboard no API_KEY for each platform , it’s only one API_KEY for all
anyway , it always gives me this error