config

type Interface interface {
	Init() error
	ValidateConfig() error

	Set(key string, value interface{})
	SetDefault(key string, value interface{})
	AllSettings() map[string]interface{}
	IsSet(key string) bool
	Get(key string) interface{}
	GetBool(key string) bool
	GetInt(key string) int
	GetInt64(key string) int64
	GetString(key string) string
	GetStringSlice(key string) []string
	UnmarshalKey(key string, rawVal interface{}, decoderOpts ...viper.DecoderConfigOption) error
}