To validate an Google ID Token in Golang
Usage:
authToken := "XXXXXXXXXXX.XXXXXXXXXXXX.XXXXXXXXXX"
email := "xxxx@xxxxx.iam.gserviceaccount.com"
aud := "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX.apps.googleusercontent.com"
tokeninfo, err := Verify(authToken, IssuerValidator(), ExpireValidator(), AudienceValidator(aud), EmailValidator(email))