model

type User struct {
	ID        int64  `json:id`
	UserID    int    `json:user_id`
	UserName  string `json:user_name`
	FirstName string `json:first_name`
}

type UserInter interface {
	SaveUser(ulist *User)
	UpdateUser(id uint64, ulist *User) error
	DeleteUser(id uint64) error
	GetUser(id uint64) *User
}