it has also required me to write nearly 7,000 lines of code, just to support GMail — A full HTTP/HTTPS client for validation and token issue Oauth2 is

it has also required me to write nearly 7,000 lines of code, just to support GMail — A full HTTP/HTTPS client for validation and token issue Oauth2 is a bag of hurt, but FFS this is so hyperbolically exaggerated that it's nonsense. If you had to "write a full HTTP/HTTPS client" just to talk to Google, that's on you for using tools without decent libraries in 2022...