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It appears like you’re missing some essential fields for authentication: ‘refresh_token’ and ‘client_secret’. The refresh token is used to refresh the access token which is required for the authentication process. The client secret is used to authenticate the client. You’ll have to ensure you’re providing these in your authentication request. These tokens would have been provided to you when you set up your Google APIs account or when the app was registered to use the Google service. Check your Google API Console to ensure these values are not missing from your credentials settings and that they are being correctly incorporated in your authentication script.
