@Dielan
add the password with in "mongo": { }
so your config.json would look like this
{
"url": "http://xxx:4567",
"secret": xxx,
"database": "mongo",
"port": 4567,
"mongo": {
"host": "127.0.0.1",
"port": "27017",
"username": "mongodb",
"password": "mymongopwd",
"database": "0"
}
}