Google announced in September of 2019 that they plan on ending support for V3 of the Google Sheets API, a decision that has drawn the ire of some developers.
Google Cloud Simplifies API Key Management With New Secret Manager
Google has introduced a new service that aims to centralize, manage, and secure sensitive information like API keys, passwords, certificates, and other important data. Google Cloud Secret Manager is designed to help tackle secret sprawl, a significant barrier to application security that is caused by poor management of sensitive authentication data across an application stack.