浅析node是怎么实现github第三方登录的

<a href="https://github.com/login/oauth/authorize?client_id={你自己的cilent_id}&redirect_uri=http://localhost:3001/github" class="iconfont ali-icon-github"></a>

router.get("/github",controller.auth.githubLogin)

const axios = require("axios")const querystring = require("querystring")const config = {    client_id: "你自己的client_id",    client_secret: "你自己的client_secret"}class AuthController {    async githubLogin(ctx) {        const code = ctx.request.query.code        const params = {            client_id: config.client_id,            client_secret: config.client_secret,            code: code        }        let res = await axios.post("https://github.com/login/oauth/access_token", params)        console.log(res)        const token = querystring.parse(res.data).access_token        ctx.cookies.set("token", token, {            maxAge: ctx.config.jwt.expire * 1000,        });        res = { ...ctx.errCode.SUCCESS, data: { token } };        ctx.redirect("http://172.25.78.33:8081/login/success?token="+token)    }}module.exports = exports = new AuthController();

<template>  <h1>登录成功跳转首页</h1></template><script>import {setLoginedUser} from "@/http/axios";export default {  mounted() {    setLoginedUser("github", this.$route.query.token);    this.$message({      message: "登录成功",      type: "success",    });    this.$router.push("/home");  },};</script><style></style>