add support youtubeconfig (Google Account)

[saya-yukimi]

youtubeConfig:
email: "youtube@gmail.com"
password: "password"

[devoxin]

This most likely won't be happening as the previous method for authenticating accounts was slowly becoming prone to errors (http 400). There's also a lot of code required to support this with, IMO, very little gain, as well as the security implications etc.