final String jwtClaim = "{\"iat\":1609459200,\"exp\":1609462800,\"nbf\":1609459200}";
        final Map<String, Object> attributes = new HashMap<>();

        authenticator.parseJwtClaim(jwtClaim, attributes);

        assertEquals(1609459200L, attributes.get("iat"));
        assertEquals(1609462800L, attributes.get("exp"));
        assertEquals(1609459200L, attributes.get("nbf"));
    }

    @Test

					return errors.New("iss: Expected string")
				}
				c.Issuer, err = jsonparser.ParseString(value)
				return err
			}
		case 'n':
			if string(key) == "nbf" {
				if dataType != jsonparser.Number {
					return errors.New("nbf: Expected number")
				}
				c.NotBefore, err = jsonparser.ParseInt(value)
				return err
			}
		case 's':
			if string(key) == "sub" {