Maybe I'm just being dense, but I'm using this documentation to use Google OAuth 2 login.
I'm able to successfully retrieve a JSON array that consists of the access_token, id_token, etc. The id_token is encrypted in what google calls a JWT (JSON Web Token). From what I understand, they're base 64 encoded, but base64_decode() in PHP is just giving me gibberish.
What am I doing wrong??