external

type Etcd struct {
	*etcd.KV
	*etcd.Incrementer
}

type MySQL struct {
	*gorm.DB
}

type SQLite struct {
	*gorm.DB
}

type User interface {
	ID(args ...interface{}) (int64, error)
}

type UserFunc func(args ...interface{}) (int64, error)

type UserMySQL struct {
	gorm.Model
	UniqueID string `json:"unique_id"`
}

type UserSQLite struct {
	gorm.Model
	UniqueID string `json:"unique_id"`
}

type UserStore interface {
	GetUserIDByUniqueID(uniqueID string) (int64, error)
	CreateUserByUniqueID(uniqueID string) (int64, error)
}

type UserStoreMock map[string]int64