I'm building an app that uses Google APIs (Drive and Sheets). I'm currently writing code to utilize refresh tokens. So, I'm actually generating unauthorized (401 error) requests on purpose to test my code. Until... I hit this daily unauthorized limit. I'm not sure what I can do. What does "Continued use requires signup." actually mean? Signup for what? Do I need to register my app? Do I have to signup for Google Cloud billing? Any way to avoid this while developing an app?
(Note - I can successfully call the APIs before I hit this limit - when I started working on refresh token processing, so it's nothing related to how I'm generating requests - also I see the same thing in POSTMan).
Any help appreciated...