如何在Go语言中使用反射和第三方库比较两个结构体并修改第三个结构体的值？

type User struct {
    Name   string
    Age    int64
    Hobbys Hobby
    Sex    string
}

type Hobby struct {
    Cars  Car
    Games Game
}

type Car struct {
    Brand string
    Color string
    Price string
}

type Game struct {
    Number int64
    Style  string
}

package main

import (
    "fmt"
    "github.com/r3labs/diff"
)

func main() {
    user1 := User{
        Name: "张三",
        Age:  15,
        Hobbys: Hobby{
            Cars: Car{
                Brand: "奔驰",
                Color: "白色",
                Price: "100万",
            },
            Games: Game{
                Number: 10000,
                Style:  "街机",
            },
        },
        Sex: "男",
    }

    user2 := User{
        Name: "张三",
        Age:  15,
        Hobbys: Hobby{
            Cars: Car{
                Brand: "宝马",
                Color: "白色",
                Price: "100万",
            },
            Games: Game{
                Number: 10000,
                Style:  "街机",
            },
        },
        Sex: "男",
    }

    user3 := User{
        Name: "张三",
        Age:  15,
        Hobbys: Hobby{
            Cars: Car{
                Brand: "奔驰",
                Color: "白色",
                Price: "100万",
            },
            Games: Game{
                Number: 10000,
                Style:  "街机",
            },
        },
        Sex: "男",
    }

    changes, err := diff.Diff(user1, user2)
    if err != nil {
        fmt.Println("Error:", err)
        return
    }

    for _, change := range changes {
        diff.Apply(change, &user3)
    }

    fmt.Printf("%+v\n", user3)
}