Unable to authenticate the request. Provided 'signature' is not valid for the provided client ID, or the provided 'client' is not valid. The signature was checked against the URL: /maps/api/geocode/json?components=country%3aAU%7Cpostal_code:2022&sensor=false&client=your_client&channel=web&language=en&signature=your_signature If this does not match the URL you requested, please ensure that your request is URL encoded correctly. Learn more: https://developers.google.com/maps/documentation/business/webservices/auth