When I Login Using GCP I'm Prompted for a Credit Card. Why?

If you are using AuraDB from GCP there are two ways to login. One, logging directly into http://console.neo4j.io may prompt you for a credit card if you haven't provided one already. The other, logging in by first going to https://console.cloud.google.com/ and then clicking "Manage from Provider". If you purchased AuraDB from the GCP Marketplace this latter method is the appropriate one to use. 

You can tell which one you've done by the banner in the upper right-hand corner of the page which will either show the Google logo or not (see below). 

Logged in using GCP:

Logged in directly from Console:

If you see the latter then you should log out, go to the GCP Marketplace, choose Neo4j AuraDB and then click "Manage from Provider."