A space-delimited list of the permissions that the application
requests.
aud
A descriptor of the intended target of the assertion. This
typically comes from the service auth file.
sub
The email address of the user for which the application is
requesting delegated access.
iat
The time the assertion was issued, measured in seconds since
00:00:00 UTC, January 1, 1970.
exp
The expiration time of the assertion, measured in seconds since
00:00:00 UTC, January 1, 1970. This value has a maximum of 1 hour from
the issued time.
duration
Duration of token, in seconds.
iss
Email address of the client_id of the application making the
access token request.
# NOT RUN {cred <- jsonlite::fromJSON("~/Desktop/httrtest-45693cbfac92.json")
jwt_signature(cred, "https://www.googleapis.com/auth/userinfo.profile")
# }