Helper function to create a named list used as the claim of a JWT payload. See https://datatracker.ietf.org/doc/html/rfc7519#section-4.1 for details.
jwt_claim(
  iss = NULL,
  sub = NULL,
  aud = NULL,
  exp = NULL,
  nbf = NULL,
  iat = Sys.time(),
  jti = NULL,
  ...
)(Issuer) Claim, should be rfc7519 'StringOrURI' value
(Subject) Claim, should be rfc7519 'StringOrURI' value
(Audience) Claim, should contain one or rfc7519 'StringOrURI' values
(Expiration Time) Claim, should be rfc7519 'NumericDate' value; R
POSIXct values are automatically coerced.
(Not Before) Claim, should be rfc7519 'NumericDate' value; R
POSIXct values are automatically coerced.
(Issued At) Claim, should be rfc7519 'NumericDate' value; R
POSIXct values are automatically coerced.
(JWT ID) Claim, optional unique identifier for the JWT
additional custom claims to include