config file looks like:

{
    "embedding": {
    "embedodir": "",
    "sg": 1,
    "window": 15,
    "size": 250,
    "workers": 4
    },

    "topic_model":  {
    "mallet_path": "",
    "num_topics": 5,
    "tmodir": "",
    },

    "mongo_credentials": {
        "database": "",
        "host": "",
        "port": "",
        "user": "",
        "pwd": ""
    }
}