go - Unmarshal json string to a struct that have one element of the struct itself

Question

I am go beginner and trying to unmarshal the following json string

[{
    "db": {
        "url": "mongodb://localhost",
        "port": "27000",
        "uname": "",
        "pass": "",
        "authdb": "",
        "replicas": [
            {
                "rs01": {
                    "url":"mongodb://localhost",
                    "port": "27001",
                    "uname": "",
                    "pass": "",
                    "authdb": ""
                }
            },
            {
                "rs02": {
                    "url":"mongodb://localhost",
                    "port": "27002",
                    "uname": "",
                    "pass": "",
                    "authdb": ""
                }
            }
        ]
    }
}]

here is the struct

type DBS struct {
    URL      string `json:url`
    Port     string `json:port`
    Uname    string `json:uname`
    Pass     string `json:pass`
    Authdb   string `json:authdb`
    Replicas []DBS   `json:replicas`
}

and here is the function

func loadConfigs() []DBS {
    var config []DBS
    raw, err := ioutil.ReadFile("./config.json")
    if err != nil {
        fmt.Println(err.Error())
        os.Exit(1)
    }

    json.Unmarshal(raw, &config)
    return config
}

The function is returning

{     []}

Answer 1

Waitting for answers