Google-api-php Refresh Token returns invalid_grant

Question

I\'ve nearly searched every result of the first page of google for this. But can\'t seem to find the answer. I\'m working with a refresh_token by Google\'s API and receiving

Answer 1

The invalid_grant means either means that the authorization code has already been used (available in $GET['code']) or the type of application configured in the Google APIs Console is invalid.

Make sure you select "Web Application" when registering your app in the Google APIs Console.