toJson method
Implementation
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = payload;
data['sub'] = sub;
data['iss'] = iss;
data['exp'] = exp != null ? exp!.millisecondsSinceEpoch ~/ 1000 : 0;
data['iat'] = iat != null ? iat!.millisecondsSinceEpoch ~/ 1000 : 0;
data['aud'] = aud;
return data;
}