Invalid Value At Gaxios._request (/srv/node_modules/googleapis-common/node_modules/gaxios/build/src/gaxios.js:89:23)

I am trying to make a request to the google to verify my IAP purchase but I keep getting the error Invalid Value at Gaxios._request (/srv/node_modules/googleapis-common/node_module

Solution 1:

Maybe you want to try initializing the Google API like this:

const playDeveloperApiClient = google.androidpublisher('v3');

And add auth to:

const subscription = await playDeveloperApiClient.purchases.subscriptions.get({
                auth: authClient,
                packageName: packageName, 
                subscriptionId: purchase.id,
                token: purchase.token
            });

For the purchase.id I find it odd that you are using a number for the Id, ideally you would want to put a string as I mentioned in the comments, just in case, it should be the Product ID in your Subscriptions section in the Play Console as highlighted in the picture below: