Golang read YAML file

config.go

package config

import "os"
import "log"
import "gopkg.in/yaml.v3"

const CONFIG_PATH = "/path/to/config.yml"

type Config struct {
    Conn struct {
        Host string `yaml:"host"`
        Port string `yaml:"port"`
        Username string `yaml:"username"`
        Password string `yaml:"password"`
        AuthenticationDatabase string `yaml:"authenticationDatabase"`
    } `yaml:"conn"`
    Tmp string `yaml:"tmp"`
}

func ReadConfig() Config {
    var config Config

    // Open YAML file
    file, err := os.Open(CONFIG_PATH)
    if err != nil {
        log.Println(err.Error())
    }
    defer file.Close()

    // Decode YAML file to struct
    if file != nil {
        decoder := yaml.NewDecoder(file)
        if err := decoder.Decode(&config); err != nil {
            log.Println(err.Error())
        }
    }

    return config
}