Quota reached, new config.json not working/unable to generate

[m4mum]

{

       "clientID":  'I am able to get'
       "clientSecret": 'I am able to get'

"redirectUri": "https://somepath/gcontact/vendor/rapidwebltd/php-google-contacts-v3-api/redirect-handler.php", "developerKey": "", <- How to get this? "refreshToken": "" < - this I will get later

}

any help in how to get developerKey ? Looks like lot has changed on google console!

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