in src/main/java/org/apache/geronimo/microprofile/impl/jwtauth/jwt/JwtParser.java [107:114]
private String getAttribute(final JsonObject payload, final String key, final String def) {
final JsonString json = payload.getJsonString(key);
final String value = json != null ? json.getString() : def;
if (value == null) {
throw new JwtException("No " + key + " in JWT", HttpURLConnection.HTTP_UNAUTHORIZED);
}
return value;
}