[firebase_auth] Invalid JWT is generated?

[NachiketaVadera]

So, this is in reference to issue #1265. I am facing the same issue.

The Google Sign In package gives me a base64 URL safe token and as the issue mentions that the Java SDK on the server side is expecting RFC4648/RFC3548 Base64 encoding. The thing here is that after converting the token, the signature part is not being verified properly.